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How do I copy a file in Python?
... it will be replaced.
Special files such as character or block devices and pipes cannot be copied with this function.
With copy, src and dst are path names given as strings.
If you use os.path operations, use copy rather than copyfile. copyfile will only accept strings.
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Identifying the dependency relationship for python packages installed with pip
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You may also use a one line command which pipes the packages in requirements to pip show.
cut -d'=' -f1 requirements.txt | xargs pip show
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How to delete multiple values from a vector?
...lows for subsetting using the vector name only once. And you can use it in pipes :)
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Can I catch multiple Java exceptions in the same catch clause?
... @user1512999 in Java, bitwise XOR is ^ (caret) and bitwise OR is | (pipe) docs.oracle.com/javase/tutorial/java/nutsandbolts/op3.html
– Lewis Baumstark
Mar 28 '17 at 18:40
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How to copy Docker images from one host to another without using a repository
...zip2 | docker load'
It's also a good idea to put pv in the middle of the pipe to see how the transfer is going:
docker save <image> | bzip2 | pv | \
ssh user@host 'bunzip2 | docker load'
(More info about pv: home page, man page).
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How to print Unicode character in Python?
...out = UTF8Writer(sys.stdout)
print(u'e with obfuscation: é')
Run it and pipe output to file:
python foo.py > tmp.txt
Open tmp.txt and look inside, you see this:
el@apollo:~$ cat tmp.txt
e with obfuscation: é
Thus you have saved unicode e with a obfuscation mark on it to a file.
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How to import load a .sql or .csv file into SQLite?
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Remember that the default delimiter for SQLite is the pipe "|"
sqlite> .separator ";"
sqlite> .import path/filename.txt tablename
http://sqlite.awardspace.info/syntax/sqlitepg01.htm#sqlite010
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How can I view all historical changes to a file in SVN
I know that I can svn diff -r a:b repo to view the changes between the two specified revisions. What I'd like is a diff for every revision that changed the file. Is such a command available?
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Checking a Python module version at runtime
...mport re
sp = subprocess.run(["pip3", "show", "numpy"], stdout=subprocess.PIPE)
ver = sp.stdout.decode('utf-8').strip().split('\n')[1]
res = re.search('^Version:\ (.*)$', ver)
print(res.group(1))
or
#!/usr/bin/env python3.7
import sys
import os
import subprocess
import re
sp = subprocess.run(["...
Git stash: “Cannot apply to a dirty working tree, please stage your changes”
...| git apply -3 && git stash drop
Basically it
creates a patch
pipes that to the apply command
if there are any conflicts they will need to be resolved via 3-way merge
if apply (or merge) succeeded it drops the just applied stash item...
I wonder why there is no -f (force) option for g...