Python: Difference between revisions
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__FORCETOC__ | __FORCETOC__ | ||
=Installation= | ==Installation== | ||
Use [http://anaconda.com Anaconda]. | Use [http://anaconda.com Anaconda]. | ||
=Basic Usage= | ==Basic Usage== | ||
===Lambda Function=== | ===Lambda Function=== | ||
<syntaxhighlight lang="python"> | <syntaxhighlight lang="python"> | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
==Filesystem Read and Write== | ===Filesystem Read and Write=== | ||
===List all files in a folder=== | ====List all files in a folder==== | ||
[https://stackoverflow.com/questions/3207219/how-do-i-list-all-files-of-a-directory Reference] | [https://stackoverflow.com/questions/3207219/how-do-i-list-all-files-of-a-directory Reference] | ||
<syntaxhighlight lang="python"> | <syntaxhighlight lang="python"> | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
===Read entire text file into a list=== | ====Read entire text file into a list==== | ||
[https://stackoverflow.com/questions/3925614/how-do-you-read-a-file-into-a-list-in-python/3925701] | [https://stackoverflow.com/questions/3925614/how-do-you-read-a-file-into-a-list-in-python/3925701] | ||
<syntaxhighlight lang="python"> | <syntaxhighlight lang="python"> | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
==Regular Expressions (Regex)== | ===Regular Expressions (Regex)=== | ||
[https://docs.python.org/3/howto/regex.html Reference]<br> | [https://docs.python.org/3/howto/regex.html Reference]<br> | ||
<syntaxhighlight lang="python"> | <syntaxhighlight lang="python"> | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
=Libraries= | ===Spawning Processes=== | ||
==Numpy== | Use [https://docs.python.org/3/library/subprocess.html subprocess] to spawn other programs. | ||
<syntaxhighlight lang="python"> | |||
import subprocess | |||
subprocess.run(["ls", "-l"]) | |||
</syntaxhighlight> | |||
==Libraries== | |||
===Numpy=== | |||
Revision as of 12:58, 7 October 2019
Installation
Use Anaconda.
Basic Usage
Lambda Function
lambda x: x * 2
Filesystem Read and Write
List all files in a folder
gazeDir = "Gaze_txt_files"
# List of folders in root folder
gazeFolders = [path.join(gazeDir, x) for x in os.listdir(gazeDir)]
# List of files 2 folders down
gazeFiles = [path.join(x, y) for x in gazeFolders for y in os.listdir(x)]
Read entire text file into a list
with open('C:/path/numbers.txt') as f:
lines = f.read().splitlines()
Regular Expressions (Regex)
import re
myReg = re.compile(r'height:(\d+)cm')
myMatch = re.match(myReg, "height:33cm");
print(myMatch[1])
# 33
Spawning Processes
Use subprocess to spawn other programs.
import subprocess
subprocess.run(["ls", "-l"])