env: python\r: 没有那个文件或目录
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env: python\r: No such file or directory
提问by Niklas R
My Python script beakcontains the following shebang:
我的 Python 脚本beak包含以下 shebang：
#!/usr/bin/env python
When I run the script $ ./beak, I get
当我运行脚本时$ ./beak，我得到
env: python\r: No such file or directory
I previously pulled this script from a repository. What could be the reason for this?
我之前从存储库中提取了此脚本。这可能是什么原因？
采纳答案by falsetru
The script contains CR characters. The shell interprets these CR characters as arguments.
该脚本包含 CR 字符。Shell 将这些 CR 字符解释为参数。
Solution: Remove the CR characters from the script using the following script.
解决方案：使用以下脚本从脚本中删除 CR 字符。
with open('beak', 'rb+') as f:
content = f.read()
f.seek(0)
f.write(content.replace(b'\r', b''))
f.truncate()
回答by Niklas R
The answer of falsetru did absolutely solve my problem. I wrote a small helper that allows me to normalize line-endings of multiple files. As I am not very familar with the line-endings stuff on multiple platforms, etc. the terminology used in the program might not be 100% correct.
falsetru 的答案确实解决了我的问题。我写了一个小助手，它允许我规范化多个文件的行尾。由于我不太熟悉多个平台上的行尾内容等，程序中使用的术语可能不是 100% 正确。
#!/usr/bin/env python
# Copyright (c) 2013 Niklas Rosenstein
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import os
import sys
import glob
import argparse
def process_file(name, lend):
with open(name, 'rb') as fl:
data = fl.read()
data = data.replace('\r\n', '\n').replace('\r', '\n')
data = data.replace('\n', lend)
with open(name, 'wb') as fl:
fl.write(data)
def main():
parser = argparse.ArgumentParser(description='Convert line-endings of one '
'or more files.')
parser.add_argument('-r', '--recursive', action='store_true',
help='Process all files in a given directory recursively.')
parser.add_argument('-d', '--dest', default='unix',
choices=('unix', 'windows'), help='The destination line-ending '
'type. Default is unix.')
parser.add_argument('-e', '--is-expr', action='store_true',
help='Arguments passed for the FILE parameter are treated as '
'glob expressions.')
parser.add_argument('-x', '--dont-issue', help='Do not issue missing files.',
action='store_true')
parser.add_argument('files', metavar='FILE', nargs='*',
help='The files or directories to process.')
args = parser.parse_args()
# Determine the new line-ending.
if args.dest == 'unix':
lend = '\n'
else:
lend = '\r\n'
# Process the files/direcories.
if not args.is_expr:
for name in args.files:
if os.path.isfile(name):
process_file(name, lend)
elif os.path.isdir(name) and args.recursive:
for dirpath, dirnames, files in os.walk(name):
for fn in files:
fn = os.path.join(dirpath, fn)
process_file(fn, fn)
elif not args.dont_issue:
parser.error("File '%s' does not exist." % name)
else:
if not args.recursive:
for name in args.files:
for fn in glob.iglob(name):
process_file(fn, lend)
else:
for name in args.files:
for dirpath, dirnames, files in os.walk('.'):
for fn in glob.iglob(os.path.join(dirpath, name)):
process_file(fn, lend)
if __name__ == "__main__":
main()
回答by Rondo
You can convert the line ending into *nix-friendly ones with
您可以将行结尾转换为 *nix-friendly 的
dos2unix beak
回答by ccpizza
Open the file in vimor vi, and administer the following command:
在vim或 中打开文件vi，并管理以下命令：
:set ff=unix
Save and exit:
保存并退出：
:wq
Done!
完毕！
Explanation
解释
ffstands for file format, and can accept the values of unix(\n), dos(\r\n) and mac(\r) (only meant to be used on pre-intel macs, on modern macs use unix).
ff代表文件格式，并且可以接受unix( \n)、dos( \r\n) 和mac( \r) 的值（仅适用于 pre-intel macs，在现代 macs 上使用unix）。
To read more about the ffcommand:
要阅读有关该ff命令的更多信息：
:help ff
:wqstands for Write and Quit, a faster equivalent is Shift+zz(i.e. hold down Shiftthen press ztwice).
:wq代表W¯¯仪式和QUIT，更快的等效Shift+ zz（即按住Shift键，然后按z两次）。
Both commands must be used in command mode.
这两个命令都必须在命令模式下使用。
Usage on multiple files
对多个文件的使用
It is not necessary to actually open the file in vim. The modification can be made directly from the command line:
没有必要在 vim 中实际打开文件。可以直接从命令行进行修改：
vi +':wq ++ff=unix' file_with_dos_linebreaks.py
To process multiple *.pyfiles (in bash):
处理多个*.py文件（在bash）：
for file in *.py ; do
vi +':w ++ff=unix' +':q' "${file}"
done
回答by csib
If you use PyCharm you can easily solve it by set the line separator to LF. See my screenshot.
如果您使用 PyCharm，您可以通过将行分隔符设置为 LF 来轻松解决它。看我的截图。
