Pipes
Programs launched from the shell can also be launch from Python.
# Pipe object:
#
# Programs launched from the shell ...
# can also be launch from Python using pipe object.
#
# The return value is an object that behaves like a file.
import os
cmd = 'ls -l'
fp = os.popen(cmd)
res = fp.read()
print(res)
# -rw-rw-r-- 1 catalin catalin 16384 iul 15 12:35 images_db
# drwxr-xr-x 3 catalin catalin 4096 iul 13 09:35 layouts
# drwxr-xr-x 5 catalin catalin 4096 iun 4 2020 library
stat = fp.close()
print(stat) # None (no errors)
Check
Using pipe you can md5sum to check if two files have the same content.
# Using pipe ...
# you can use md5sum ...
# to check if two files have the same content.
import os
DIR = os.path.dirname(os.path.realpath(__file__))
file1 = DIR + "/data/01.txt"
f = open(file1, "w")
f.write("1234567890")
f.close()
file2 = DIR + "/data/02.txt"
f = open(file2, "w")
f.write("1234567890")
f.close()
def md5sum (filename):
cmd = 'md5sum ' + filename
fp = os.popen(cmd)
res = fp.read()
print(res)
# 5a92d5b6e2303c7fea60297d2c985713 01.txt
md5sum = res.replace(filename, '')
stat = fp.close()
return md5sum
assert md5sum(file1) == md5sum(file2) # pass
Last update: 386 days ago
