Python - Automatically writing all print statements to a log fil

Question

I have a scripts that contains lots of print statements along the process, here is an example:

import pandas
print "pandas library imported"
df = pd.Dataframe(...)
print "df created."

print "There are {0} rows and {1} columns in the data frame".format(df.shape[0], df.shape[1])

...

So is there a way that I can put all the print statements in a log file?

Possible duplicate of [Python, logging print statements while having them print to stdout](http://stackoverflow.com/questions/17866724/python-logging-print-statements-while-having-them-print-to-stdout) — Peter Wood, May 16 '17 at 16:34

score 5 · Accepted Answer · answered May 16 '17 at 16:36

5

Replace stdout with your log file:

import sys
sys.stdout = open('log.txt', 'r')

import pandas

print "pandas library imported"
df = pd.Dataframe(...)
print "df created."

Output log.txt:

pandas library imported
df created.

answered May 16 '17 at 16:36

Peter Wood

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Thanks Peter. This way hides all the print statement while running the process, is there a way that I can still printing out the messages on the command line? – DanZimmerman May 16 '17 at 17:40
1

@thatMeow See answers to the linked duplicate above – Peter Wood May 16 '17 at 18:32

score 0 · Answer 2 · answered May 16 '17 at 16:27

0

Use from __future__ import print_function and call print with the file keyword-argument.

Alternatively, redirect the output of your script to a file in your shell.

answered May 16 '17 at 16:27

timgeb

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Python - Automatically writing all print statements to a log fil

2 Answers2