2to3 命令

常用示例

说明

2to3 is an automated Python 2 to Python 3 code translator. It parses Python 2 source code and applies "fixers" that transform incompatible syntax and library calls to their Python 3 equivalents. Common transformations include: - print statement to print() function - unicode to str, str to bytes - raw_input() to input() - Iterator methods (.iteritems() to .items()) - except Exception, e to except Exception as e - Library renames (urllib, ConfigParser, etc.) 2to3 handles most mechanical changes but may require manual review for semantic differences between Python 2 and 3.

参数

-w, --write

Write changes to files

-n, --nobackups

Don't create .bak backup files

-f _fixer_, --fix _fixer_

Apply specific fixer

-x _fixer_, --nofix _fixer_

Exclude specific fixer

-l, --list-fixes

List available fixers

-p, --print-function

Treat print as a function (skip the print fixer). Useful when the file already uses from __future__ import print_function.

-d, --doctests_only

Only fix doctests inside the file.

-W, --write-unchanged-files

Write output even for unchanged files (useful with -o).

--add-suffix _SUFFIX_

Append this suffix to output filenames instead of overwriting.

-j _n_, --processes _n_

Run in parallel with n processes

-o _dir_, --output-dir _dir_

Write converted files to directory

-v, --verbose

More verbose output