Mercurial Repositories > eric / file comparison
comparison: eric6/Plugins/CheckerPlugins/CodeStyleChecker/Simplify/ast_unparse.py
eric6/Plugins/CheckerPlugins/CodeStyleChecker/Simplify/ast_unparse.py
- changeset 8436
- f22f8d8337b8
- parent 8252
- 70855a87f546
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| 8434:a105f31ba10f | 8436:f22f8d8337b8 |
|---|---|
| 11 """ | 11 """ |
| 12 | 12 |
| 13 import ast | 13 import ast |
| 14 import sys | 14 import sys |
| 15 from enum import IntEnum, auto | 15 from enum import IntEnum, auto |
| 16 from contextlib import contextmanager, nullcontext | 16 from contextlib import contextmanager |
| 17 | 17 |
| 18 import AstUtilities | 18 import AstUtilities |
| 19 | |
| 20 try: | |
| 21 from contextlib import nullcontext | |
| 22 except ImportError: | |
| 23 # 'nullcontext'' was defined in Python 3.7. The following code is a copy | |
| 24 # of that class. | |
| 25 | |
| 26 from contextlib import AbstractContextManager | |
| 27 | |
| 28 class nullcontext(AbstractContextManager): | |
| 29 """Context manager that does no additional processing. | |
| 30 | |
| 31 Used as a stand-in for a normal context manager, when a particular | |
| 32 block of code is only sometimes used with a normal context manager: | |
| 33 | |
| 34 cm = optional_cm if condition else nullcontext() | |
| 35 with cm: | |
| 36 # Perform operation, using optional_cm if condition is True | |
| 37 """ | |
| 38 | |
| 39 def __init__(self, enter_result=None): | |
| 40 self.enter_result = enter_result | |
| 41 | |
| 42 def __enter__(self): | |
| 43 return self.enter_result | |
| 44 | |
| 45 def __exit__(self, *excinfo): | |
| 46 pass | |
| 19 | 47 |
| 20 # Large float and imaginary literals get turned into infinities in the AST. | 48 # Large float and imaginary literals get turned into infinities in the AST. |
| 21 # We unparse those infinities to INFSTR. | 49 # We unparse those infinities to INFSTR. |
| 22 _INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1) | 50 _INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1) |
| 23 | 51 |
