diff -r f25fc1364c88 -r 96232974dcdb Plugins/CheckerPlugins/CodeStyleChecker/CodeStyleFixer.py
--- a/Plugins/CheckerPlugins/CodeStyleChecker/CodeStyleFixer.py Sun Jan 05 23:22:17 2014 +0100
+++ b/Plugins/CheckerPlugins/CodeStyleChecker/CodeStyleFixer.py Sun Mar 30 22:00:14 2014 +0200
@@ -7,20 +7,23 @@
Module implementing a class to fix certain code style issues.
"""
-from __future__ import unicode_literals
-
+try:
+ # Python 2
+ from StringIO import StringIO # __IGNORE_EXCEPTION__
+except ImportError:
+ # Python 3
+ from io import StringIO # __IGNORE_WARNING__
import os
import re
+import sys
import tokenize
-import io
-
-from PyQt4.QtCore import QObject
-from E5Gui import E5MessageBox
-
-from . import pep8
-
-import Utilities
+# CodeStyleCheckerDialog tries to import FixableCodeStyleIssues what fail under
+# Python3. So ignore it.
+try:
+ import pep8
+except ImportError:
+ pass
FixableCodeStyleIssues = [
"D111", "D112", "D113", "D121", "D131", "D141",
@@ -40,16 +43,15 @@
]
-class CodeStyleFixer(QObject):
+class CodeStyleFixer(object):
"""
Class implementing a fixer for certain code style issues.
"""
- def __init__(self, project, filename, sourceLines, fixCodes, noFixCodes,
- maxLineLength, inPlace):
+ def __init__(self, filename, sourceLines, fixCodes, noFixCodes,
+ maxLineLength, inPlace, eol):
"""
Constructor
- @param project reference to the project object (Project)
@param filename name of the file to be fixed (string)
@param sourceLines list of source lines including eol marker
(list of string)
@@ -59,10 +61,10 @@
separated string (string)
@param maxLineLength maximum allowed line length (integer)
@param inPlace flag indicating to modify the file in place (boolean)
+ @param eol end of line character(s) (string)
"""
super(CodeStyleFixer, self).__init__()
- self.__project = project
self.__filename = filename
self.__origName = ""
self.__source = sourceLines[:] # save a copy
@@ -73,15 +75,18 @@
self.fixed = 0
self.__reindenter = None
- self.__eol = ""
self.__indentWord = self.__getIndentWord()
- if not inPlace:
+ if inPlace:
+ # TODO: Do a backup before any changes
+ pass
+ else:
self.__origName = self.__filename
self.__filename = os.path.join(
os.path.dirname(self.__filename),
"fixed_" + os.path.basename(self.__filename))
-
+ self.__eol = eol
+
self.__fixes = {
"D111": self.__fixD111,
"D112": self.__fixD112,
@@ -174,27 +179,27 @@
Public method to save the modified file.
@param encoding encoding of the source file (string)
- @return flag indicating success (boolean)
+ @return error message on failure (tuple of str)
"""
+ import codecs
+
if not self.__modified:
# no need to write
- return True
+ return
txt = "".join(self.__source)
try:
- Utilities.writeEncodedFile(self.__filename, txt, encoding)
- except (IOError, Utilities.CodingError, UnicodeError) as err:
- E5MessageBox.critical(
- self,
- self.trUtf8("Fix Code Style Issues"),
- self.trUtf8(
- """<p>Could not save the file <b>{0}</b>."""
- """ Skipping it.</p><p>Reason: {1}</p>""")
- .format(self.__filename, str(err))
- )
- return False
-
- return True
+ if sys.version_info[0] == 3:
+ txt = txt.encode(encoding)
+ if encoding == 'utf-8-bom':
+ txt = codecs.BOM_UTF8 + txt
+
+ with open(self.__filename, "wb") as fp:
+ fp.write(txt)
+ except (IOError, UnicodeError) as err:
+ # Could not save the file! Skipping it. Reason: {0}
+ return ("FWRITE_ERROR", (str(err),))
+ return
def __codeMatch(self, code):
"""
@@ -237,7 +242,10 @@
a message for the fix (string) and an ID for a deferred
fix (integer)
"""
- code = message.split(None, 1)[0].strip()
+ if isinstance(message, (tuple, list)):
+ code = message[0].strip()
+ else:
+ code = message.split(None, 1)[0].strip()
if line <= len(self.__source) and \
self.__codeMatch(code) and \
@@ -286,24 +294,6 @@
self.__lastID += 1
return self.__lastID
- def __getEol(self):
- """
- Private method to get the applicable eol string.
-
- @return eol string (string)
- """
- if not self.__eol:
- if self.__origName:
- fn = self.__origName
- else:
- fn = self.__filename
-
- if self.__project.isOpen() and self.__project.isProjectFile(fn):
- self.__eol = self.__project.getEolString()
- else:
- self.__eol = Utilities.linesep()
- return self.__eol
-
def __findLogical(self):
"""
Private method to extract the index of all the starts and ends of
@@ -315,7 +305,7 @@
logical_start = []
logical_end = []
last_newline = True
- sio = io.StringIO("".join(self.__source))
+ sio = StringIO("".join(self.__source))
parens = 0
for t in tokenize.generate_tokens(sio.readline):
if t[0] in [tokenize.COMMENT, tokenize.DEDENT,
@@ -374,7 +364,7 @@
@return string to be used for an indentation (string)
"""
- sio = io.StringIO("".join(self.__source))
+ sio = StringIO("".join(self.__source))
indentWord = " " # default in case of failure
try:
for token in tokenize.generate_tokens(sio.readline):
@@ -405,7 +395,7 @@
"""
if self.__multiLineNumbers is None:
source = "".join(self.__source)
- sio = io.StringIO(source)
+ sio = StringIO(source)
self.__multiLineNumbers = set()
self.__docLineNumbers = set()
previousTokenType = ''
@@ -511,11 +501,8 @@
break
line += 1
- return (
- 1,
- self.trUtf8(
- "Triple single quotes converted to triple double quotes."),
- 0)
+ # Triple single quotes converted to triple double quotes.
+ return (1, "FD111", 0)
def __fixD112(self, code, line, pos):
"""
@@ -541,11 +528,8 @@
newText = self.__getIndent(self.__source[line]) + \
insertChar + self.__source[line].lstrip()
self.__source[line] = newText
- return (
- 1,
- self.trUtf8('Introductory quotes corrected to be {0}"""')
- .format(insertChar),
- 0)
+ # Introductory quotes corrected to be {0}"""
+ return (1, ('FD112', (insertChar,)), 0)
def __fixD121(self, code, line, pos, apply=False):
"""
@@ -572,17 +556,15 @@
docstring = self.__source[line].rstrip() + \
self.__source[line + 1].strip()
if docstring.endswith('"""'):
- docstring += self.__getEol()
+ docstring += self.__eol
else:
docstring += self.__source[line + 2].lstrip()
self.__source[line + 2] = ""
self.__source[line] = docstring
self.__source[line + 1] = ""
- return (
- 1,
- self.trUtf8("Single line docstring put on one line."),
- 0)
+ # Single line docstring put on one line.
+ return (1, "FD121", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -608,18 +590,19 @@
self.__source[line].lstrip().startswith(('"""', 'r"""', 'u"""')):
# it is a one-liner
newText = self.__source[line].rstrip()[:-3].rstrip() + "." + \
- self.__source[line].rstrip()[-3:] + self.__getEol()
+ self.__source[line].rstrip()[-3:] + self.__eol
else:
if line < len(self.__source) - 1 and \
(not self.__source[line + 1].strip() or
self.__source[line + 1].lstrip().startswith("@") or
(self.__source[line + 1].strip() in ('"""', "'''") and
not self.__source[line].lstrip().startswith("@"))):
- newText = self.__source[line].rstrip() + "." + self.__getEol()
+ newText = self.__source[line].rstrip() + "." + self.__eol
if newText:
self.__source[line] = newText
- return (1, self.trUtf8("Period added to summary line."), 0)
+ # Period added to summary line.
+ return (1, "FD131", 0)
else:
return (0, "", 0)
@@ -642,11 +625,8 @@
if apply:
line = line - 1
self.__source[line - 1] = ""
- return (
- 1,
- self.trUtf8(
- "Blank line before function/method docstring removed."),
- 0)
+ # Blank line before function/method docstring removed.
+ return (1, "FD141", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -670,11 +650,9 @@
"""
if apply:
line = line - 1
- self.__source[line] = self.__getEol() + self.__source[line]
- return (
- 1,
- self.trUtf8("Blank line inserted before class docstring."),
- 0)
+ self.__source[line] = self.__eol + self.__source[line]
+ # Blank line inserted before class docstring.
+ return (1, "FD142", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -698,11 +676,9 @@
"""
if apply:
line = line - 1
- self.__source[line] += self.__getEol()
- return (
- 1,
- self.trUtf8("Blank line inserted after class docstring."),
- 0)
+ self.__source[line] += self.__eol
+ # Blank line inserted after class docstring.
+ return (1, "FD143", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -730,11 +706,9 @@
# only correct summary lines can be fixed here
return (0, "", 0)
- self.__source[line] += self.__getEol()
- return (
- 1,
- self.trUtf8("Blank line inserted after docstring summary."),
- 0)
+ self.__source[line] += self.__eol
+ # Blank line inserted after docstring summary.
+ return (1, "FD144", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -758,12 +732,9 @@
"""
if apply:
line = line - 1
- self.__source[line] = self.__getEol() + self.__source[line]
- return (
- 1,
- self.trUtf8("Blank line inserted after last paragraph"
- " of docstring."),
- 0)
+ self.__source[line] = self.__eol + self.__source[line]
+ # Blank line inserted after last paragraph of docstring.
+ return (1, "FD145", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -798,13 +769,15 @@
else:
# trailing
first, second = source[:-3].strip(), source[-3:]
- newText = indent + first + self.__getEol() + \
- indent + second + self.__getEol()
+ newText = indent + first + self.__eol + \
+ indent + second + self.__eol
self.__source[line] = newText
if code == "D221":
- msg = self.trUtf8("Leading quotes put on separate line.")
+ # Leading quotes put on separate line.
+ msg = "FD221"
else:
- msg = self.trUtf8("Trailing quotes put on separate line.")
+ # Trailing quotes put on separate line.
+ msg = "FD222"
return (1, msg, 0)
else:
id = self.__getID()
@@ -831,10 +804,11 @@
line = line - 1
self.__source[line - 1] = ""
if code == "D242":
- msg = self.trUtf8("Blank line before class docstring removed.")
+ # Blank line before class docstring removed.
+ msg = "FD242"
else:
- msg = self.trUtf8(
- "Blank line before function/method docstring removed.")
+ # Blank line before function/method docstring removed.
+ msg = "FD244"
return (1, msg, 0)
else:
id = self.__getID()
@@ -861,10 +835,11 @@
line = line - 1
self.__source[line + 1] = ""
if code == "D243":
- msg = self.trUtf8("Blank line after class docstring removed.")
+ # Blank line after class docstring removed.
+ msg = "FD243"
else:
- msg = self.trUtf8(
- "Blank line after function/method docstring removed.")
+ # Blank line after function/method docstring removed.
+ msg = "FD245"
return (1, msg, 0)
else:
id = self.__getID()
@@ -890,10 +865,8 @@
if apply:
line = line - 1
self.__source[line - 1] = ""
- return (
- 1,
- self.trUtf8("Blank line after last paragraph removed."),
- 0)
+ # Blank line after last paragraph removed.
+ return (1, "FD247", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -919,10 +892,11 @@
if fixedLine is not None and fixedLine != self.__source[line - 1]:
self.__source[line - 1] = fixedLine
if code in ["E101", "W191"]:
- msg = self.trUtf8("Tab converted to 4 spaces.")
+ # Tab converted to 4 spaces.
+ msg = "FE101"
else:
- msg = self.trUtf8(
- "Indentation adjusted to be a multiple of four.")
+ # Indentation adjusted to be a multiple of four.
+ msg = "FE111"
return (1, msg, 0)
else:
return (0, "", 0)
@@ -950,11 +924,11 @@
changed = self.__fixReindent(line, pos, logical)
if changed:
if code == "E121":
- msg = self.trUtf8(
- "Indentation of continuation line corrected.")
+ # Indentation of continuation line corrected.
+ msg = "FE121"
elif code == "E124":
- msg = self.trUtf8(
- "Indentation of closing bracket corrected.")
+ # Indentation of closing bracket corrected.
+ msg = "FE124"
return (1, msg, 0)
return (0, "", 0)
else:
@@ -989,11 +963,8 @@
indentation = self.__getIndent(text)
self.__source[line] = indentation + \
self.__indentWord + text.lstrip()
- return (
- 1,
- self.trUtf8(
- "Missing indentation of continuation line corrected."),
- 0)
+ # Missing indentation of continuation line corrected.
+ return (1, "FE122", 0)
return (0, "", 0)
else:
id = self.__getID()
@@ -1030,9 +1001,8 @@
self.__source[row] = newText
changed = True
if changed:
- return (1, self.trUtf8(
- "Closing bracket aligned to opening bracket."),
- 0)
+ # Closing bracket aligned to opening bracket.
+ return (1, "FE123", 0)
return (0, "", 0)
else:
id = self.__getID()
@@ -1065,7 +1035,8 @@
text = self.__source[row]
self.__source[row] = self.__getIndent(text) + \
self.__indentWord + text.lstrip()
- return (1, self.trUtf8("Indentation level changed."), 0)
+ # Indentation level changed.
+ return (1, "FE125", 0)
return (0, "", 0)
else:
id = self.__getID()
@@ -1104,9 +1075,8 @@
self.__source[row] = newText
changed = True
if changed:
- return (1, self.trUtf8(
- "Indentation level of hanging indentation changed."),
- 0)
+ # Indentation level of hanging indentation changed.
+ return (1, "FE126", 0)
return (0, "", 0)
else:
id = self.__getID()
@@ -1160,7 +1130,8 @@
self.__source[row] = newText
changed = True
if changed:
- return (1, self.trUtf8("Visual indentation corrected."), 0)
+ # Visual indentation corrected.
+ return (1, "FE127", 0)
return (0, "", 0)
else:
id = self.__getID()
@@ -1191,7 +1162,8 @@
return (0, "", 0)
self.__source[line] = newText
- return (1, self.trUtf8("Extraneous whitespace removed."), 0)
+ # Extraneous whitespace removed.
+ return (1, "FE201", 0)
def __fixE221(self, code, line, pos):
"""
@@ -1220,9 +1192,11 @@
self.__source[line] = newText
if code in ["E225", "E226", "E227", "E228"]:
- return (1, self.trUtf8("Missing whitespace added."), 0)
+ # Missing whitespace added.
+ return (1, "", 0)
else:
- return (1, self.trUtf8("Extraneous whitespace removed."), 0)
+ # Extraneous whitespace removed.
+ return (1, "", 0)
def __fixE231(self, code, line, pos):
"""
@@ -1241,7 +1215,8 @@
pos = pos + 1
self.__source[line] = self.__source[line][:pos] + \
" " + self.__source[line][pos:]
- return (1, self.trUtf8("Missing whitespace added."), 0)
+ # Missing whitespace added.
+ return (1, "FE231", 0)
def __fixE251(self, code, line, pos):
"""
@@ -1278,7 +1253,8 @@
self.__source[line + 1] = self.__source[line + 1].lstrip()
else:
self.__source[line] = newText
- return (1, self.trUtf8("Extraneous whitespace removed."), 0)
+ # Extraneous whitespace removed.
+ return (1, "FE251", 0)
def __fixE261(self, code, line, pos):
"""
@@ -1299,7 +1275,8 @@
right = text[pos:].lstrip(' \t#')
newText = left + (" # " + right if right.strip() else right)
self.__source[line] = newText
- return (1, self.trUtf8("Whitespace around comment sign corrected."), 0)
+ # Whitespace around comment sign corrected.
+ return (1, "FE261", 0)
def __fixE301(self, code, line, pos, apply=False):
"""
@@ -1317,8 +1294,9 @@
fix (integer)
"""
if apply:
- self.__source.insert(line - 1, self.__getEol())
- return (1, self.trUtf8("One blank line inserted."), 0)
+ self.__source.insert(line - 1, self.__eol)
+ # One blank line inserted.
+ return (1, "FE301", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1355,30 +1333,20 @@
if delta < 0:
# insert blank lines (one or two)
while delta < 0:
- self.__source.insert(line, self.__getEol())
+ self.__source.insert(line, self.__eol)
delta += 1
- changed = True
+ # %n blank line(s) inserted.
+ return (1, ("FE302+", 2 - blanks), 0)
elif delta > 0:
# delete superfluous blank lines
while delta > 0:
del self.__source[line - 1]
line -= 1
delta -= 1
- changed = True
+ # %n superfluous line(s) removed.
+ return (1, ("FE302-", blanks - 2), 0)
else:
- changed = False
-
- if changed:
- if delta < 0:
- msg = self.trUtf8(
- "%n blank line(s) inserted.", "", -delta)
- elif delta > 0:
- msg = self.trUtf8(
- "%n superfluous lines removed", "", delta)
- else:
- msg = ""
- return (1, msg, 0)
- return (0, "", 0)
+ return (0, "", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1407,7 +1375,8 @@
index -= 1
else:
break
- return (1, self.trUtf8("Superfluous blank lines removed."), 0)
+ # Superfluous blank lines removed.
+ return (1, "FE303", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1437,9 +1406,8 @@
index -= 1
else:
break
- return (1, self.trUtf8(
- "Superfluous blank lines after function decorator removed."),
- 0)
+ # Superfluous blank lines after function decorator removed.
+ return (1, "FE304", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1472,10 +1440,11 @@
if ';' in text:
return (0, "", 0)
- newText = text[:pos].rstrip("\t ,") + self.__getEol() + \
+ newText = text[:pos].rstrip("\t ,") + self.__eol + \
self.__getIndent(text) + "import " + text[pos:].lstrip("\t ,")
self.__source[line] = newText
- return (1, self.trUtf8("Imports were put on separate lines."), 0)
+ # Imports were put on separate lines.
+ return (1, "FE401", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1512,7 +1481,7 @@
nextText = ""
shortener = LineShortener(
text, prevText, nextText,
- maxLength=self.__maxLineLength, eol=self.__getEol(),
+ maxLength=self.__maxLineLength, eol=self.__eol,
indentWord=self.__indentWord, isDocString=isDocString)
changed, newText, newNextText = shortener.shorten()
if changed:
@@ -1522,7 +1491,8 @@
if newNextText == " ":
newNextText = ""
self.__source[line + 1] = newNextText
- return (1, self.trUtf8("Long lines have been shortened."), 0)
+ # Long lines have been shortened.
+ return (1, "FE501", 0)
else:
return (0, "", 0)
else:
@@ -1544,8 +1514,9 @@
fix (integer)
"""
self.__source[line - 1] = \
- self.__source[line - 1].rstrip("\n\r \t\\") + self.__getEol()
- return (1, self.trUtf8("Redundant backslash in brackets removed."), 0)
+ self.__source[line - 1].rstrip("\n\r \t\\") + self.__eol
+ # Redundant backslash in brackets removed.
+ return (1, "FE502", 0)
def __fixE701(self, code, line, pos, apply=False):
"""
@@ -1567,11 +1538,12 @@
text = self.__source[line]
pos = pos + 1
- newText = text[:pos] + self.__getEol() + self.__getIndent(text) + \
+ newText = text[:pos] + self.__eol + self.__getIndent(text) + \
self.__indentWord + text[pos:].lstrip("\n\r \t\\") + \
- self.__getEol()
+ self.__eol
self.__source[line] = newText
- return (1, self.trUtf8("Compound statement corrected."), 0)
+ # Compound statement corrected.
+ return (1, "FE701", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1601,12 +1573,13 @@
self.__source[line] = text.rstrip("\n\r \t\\")
self.__source[line + 1] = self.__source[line + 1].lstrip()
elif text.rstrip().endswith(";"):
- self.__source[line] = text.rstrip("\n\r \t;") + self.__getEol()
+ self.__source[line] = text.rstrip("\n\r \t;") + self.__eol
else:
- first = text[:pos].rstrip("\n\r \t;") + self.__getEol()
+ first = text[:pos].rstrip("\n\r \t;") + self.__eol
second = text[pos:].lstrip("\n\r \t;")
self.__source[line] = first + self.__getIndent(text) + second
- return (1, self.trUtf8("Compound statement corrected."), 0)
+ # Compound statement corrected.
+ return (1, "FE702", 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1647,7 +1620,8 @@
return (0, "", 0)
self.__source[line] = " ".join([left, center, right])
- return (1, self.trUtf8("Comparison to None/True/False corrected."), 0)
+ # Comparison to None/True/False corrected.
+ return (1, "FE711", 0)
def __fixN804(self, code, line, pos, apply=False):
"""
@@ -1675,7 +1649,7 @@
if text.rstrip().endswith("("):
newText = text + self.__getIndent(text) + \
- self.__indentWord + arg + "," + self.__getEol()
+ self.__indentWord + arg + "," + self.__eol
else:
index = text.find("(") + 1
left = text[:index]
@@ -1686,7 +1660,8 @@
center = arg + ", "
newText = left + center + right
self.__source[line] = newText
- return (1, self.trUtf8("'{0}' argument added.").format(arg), 0)
+ # '{0}' argument added.
+ return (1, ("FN804", (arg,)), 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1746,7 +1721,8 @@
else:
self.__source[line] = indent + right
- return (1, self.trUtf8("'{0}' argument removed.").format(arg), 0)
+ # '{0}' argument removed.
+ return (1, ("FN806", arg), 0)
else:
id = self.__getID()
self.__stack.append((id, code, line, pos))
@@ -1767,7 +1743,8 @@
"""
self.__source[line - 1] = re.sub(r'[\t ]+(\r?)$', r"\1",
self.__source[line - 1])
- return (1, self.trUtf8("Whitespace stripped from end of line."), 0)
+ # Whitespace stripped from end of line.
+ return (1, "FW291", 0)
def __fixW292(self, code, line, pos):
"""
@@ -1782,8 +1759,9 @@
a message for the fix (string) and an ID for a deferred
fix (integer)
"""
- self.__source[line - 1] += self.__getEol()
- return (1, self.trUtf8("newline added to end of file."), 0)
+ self.__source[line - 1] += self.__eol
+ # newline added to end of file.
+ return (1, "FW292", 0)
def __fixW391(self, code, line, pos):
"""
@@ -1805,8 +1783,8 @@
index -= 1
else:
break
- return (1, self.trUtf8(
- "Superfluous trailing blank lines removed from end of file."), 0)
+ # Superfluous trailing blank lines removed from end of file.
+ return (1, "FW391", 0)
def __fixW603(self, code, line, pos):
"""
@@ -1822,7 +1800,8 @@
fix (integer)
"""
self.__source[line - 1] = self.__source[line - 1].replace("<>", "!=")
- return (1, self.trUtf8("'<>' replaced by '!='."), 0)
+ # '<>' replaced by '!='.
+ return (1, "FW603", 0)
class Reindenter(object):
@@ -2043,7 +2022,7 @@
self.lines = physical_lines
self.tokens = []
self.rel_indent = None
- sio = io.StringIO(''.join(physical_lines))
+ sio = StringIO(''.join(physical_lines))
for t in tokenize.generate_tokens(sio.readline):
if not len(self.tokens) and t[0] in self.SKIP_TOKENS:
continue
@@ -2338,7 +2317,7 @@
indent = self.__getIndent(self.__text)
source = self.__text[len(indent):]
assert source.lstrip() == source
- sio = io.StringIO(source)
+ sio = StringIO(source)
# Check for multi line string.
try:
