我想从python程序运行bash脚本。脚本有这样的命令:
find . -type d -exec bash -c 'cd "$0" && gunzip -c *.gz | cut -f 3 >> ../mydoc.txt' {} \;
通常我会运行一个子进程调用,如:
subprocess.call('ls | wc -l', shell=True)
但由于引用的迹象,这里不可能。有什么建议吗?
谢谢!
答案 0 :(得分:3)
虽然问题已经得到解答,但我仍然会跳进去,因为我假设您要执行该bash脚本,因为您没有功能相同的Python代码(基本上比40行更糟糕,见下文)。 为什么这样做而不是bash脚本?
请记住(作为您的bash脚本)没有任何错误检查,输出文件是全局变量,但可以轻松更改。
import gzip
import os
# create out output file
outfile = open('/tmp/output.txt', mode='w', encoding='utf-8')
def process_line(line):
"""
get the third column (delimiter is tab char) and write to output file
"""
columns = line.split('\t')
if len(columns) > 3:
outfile.write(columns[3] + '\n')
def process_zipfile(filename):
"""
read zip file content (we assume text) and split into lines for processing
"""
print('Reading {0} ...'.format(filename))
with gzip.open(filename, mode='rb') as f:
lines = f.read().decode('utf-8').split('\n')
for line in lines:
process_line(line.strip())
def process_directory(dirtuple):
"""
loop thru the list of files in that directory and process any .gz file
"""
print('Processing {0} ...'.format(dirtuple[0]))
for filename in dirtuple[2]:
if filename.endswith('.gz'):
process_zipfile(os.path.join(dirtuple[0], filename))
# walk the directory tree from current directory downward
for dirtuple in os.walk('.'):
process_directory(dirtuple)
outfile.close()
答案 1 :(得分:2)
使用'
退出\
标记。
即。对于每一个:'
,请替换为:\'
答案 2 :(得分:1)
三重引号或三重双引号('''某些字符串'''或“”“其他字符串”“”)也很方便。请参阅here(是的,它的python3文档,但它在python2中都可以100%工作)
mystring = """how many 'cakes' can you "deliver"?"""
print(mystring)
how many 'cakes' can you "deliver"?