{"id":927,"date":"2016-01-02T14:56:15","date_gmt":"2016-01-02T14:56:15","guid":{"rendered":"http:\/\/malemuk.com\/olofee\/?p=927"},"modified":"2016-01-02T14:56:15","modified_gmt":"2016-01-02T14:56:15","slug":"python-tips","status":"publish","type":"post","link":"http:\/\/malemuk.com\/olofee\/python-tips\/","title":{"rendered":"Python tips"},"content":{"rendered":"

Check also out the excellent documentation at python.org<\/a><\/p>\n

Environment<\/strong><\/p>\n

Reimport a module after modifications:
\nimport imp
\nimp.reload(mymodule)
\n<\/code><\/p>\n

Append directories to your Python Path:
\nimport sys
\nsys.path.append(\"home\/mydir\") # UNIX path
\nsys.path.append(\"D:\\\\data\\\\mydir\") # Windows path
\n<\/code><\/p>\n

In order to run self-coded functions, you need to place them in a module and then import the module. A module is a folder containing a file called __init__.py<\/p>\n

If you want to be able to call
\nfrom module import *<\/code>
\nthe file must contain a definition of the
\n__all__<\/code>
\nvariable:
\n__all__ = [\"func1\" \"func2\"]<\/code>
\nwhere the brackets contain the list of submodules (remember to keep it up-to-date). In the example above, the submodule files are ‘func1.py’ and ‘func2.py’.
\nThe file may also contain code that you’d like executed each time the module is imported.<\/p>\n

Importing a module:
\nimport module<\/code><\/p>\n

You may still import submodules if __init__.py is empty:
\nimport module.submodule<\/code><\/p>\n

Useful commands<\/strong><\/p>\n

>>> import os
\n>>> os.getcwd() # returns current folder path
\n>>> os.chdir('newdir')
\n>>> execfile('myfile.py')
\n<\/code><\/p>\n

IDLE shortcuts<\/strong><\/p>\n

Alt-P: previous command
\nAlt-N: next command<\/p>\n

Syntax<\/strong><\/p>\n

# this is a comment<\/code><\/p>\n

List<\/strong>
\n>>> a = ['word', 100, 13]
\n>>> a[2]
\n13
\n>>> len(a)
\n3
\n>>> range(5)
\n[0, 1, 2, 3, 4]
\n<\/code><\/p>\n

Functions<\/strong>
\ndef fib(n):
\n\"\"\"Print a Fibonacci series up to n.\"\"\"
\na, b = 0, 1
\nwhile b < n:
\nprint b,
\na, b = b, a + b
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

Check also out the excellent documentation at python.org Environment Reimport a module after modifications: import imp imp.reload(mymodule) Append directories to your Python Path: import sys sys.path.append(“home\/mydir”) # UNIX path sys.path.append(“D:\\\\data\\\\mydir”) # Windows path In order to run self-coded functions, you need to place them in a module and then import the module. A module is […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-927","post","type-post","status-publish","format-standard","hentry","category-computer-stuff"],"jetpack-related-posts":[{"id":753,"url":"http:\/\/malemuk.com\/olofee\/create-bookmarks-in-pdf\/","url_meta":{"origin":927,"position":0},"title":"pdftk tips","date":"November 9, 2015","format":false,"excerpt":"Number pages Source:\u00a0http:\/\/cazencott.info\/index.php\/post\/2015\/04\/30\/Numbering-PDF-Pages Create a PDF that contains only page numbers. In numbers.tex: \\documentclass[12pt,a4paper]{article} \\usepackage{multido} \\usepackage[hmargin=.8cm,vmargin=1.5cm,nohead,nofoot]{geometry} \\begin{document} \\multido{}{31}{\\vphantom{x}\\newpage} \\end{document} (where 31 is your total number of pages). Then create numbers.pdf pdflatex numbers.tex Finally, stamp your file with page numbers: pdftk file.pdf multistamp numbers.pdf output single_document_numbered.pdf Create bookmarks Instructions for pdftk\u2026","rel":"nofollow","context":"In \"Computer stuff\"","img":{"src":"","width":0,"height":0},"classes":[]},{"id":910,"url":"http:\/\/malemuk.com\/olofee\/emacs-tips\/","url_meta":{"origin":927,"position":1},"title":"Emacs tips","date":"December 31, 2015","format":false,"excerpt":"Essential shortcuts M-: META key (ALT on most keyboards) C-: CONTROL key C-x C-f : open file C-x b : switch to buffer C-x k : kill buffer C-s : search text forward C-r : search text backward C-+ \/ C-- : Zoom in\/out C-space: mark set (start of the\u2026","rel":"nofollow","context":"In \"Computer stuff\"","img":{"src":"","width":0,"height":0},"classes":[]},{"id":137,"url":"http:\/\/malemuk.com\/olofee\/alpine-configuration\/","url_meta":{"origin":927,"position":2},"title":"Alpine configuration","date":"October 23, 2010","format":false,"excerpt":"Alpine is to email software what Emacs is to text-editing software. I love it. First, create a collection list -- I think you may skip this part if you're using pop instead of imap: S L A Nickname: any nickname Server: my.server.net:port\/ssl\/user=my_username If you're not using ssl, write tls instead.\u2026","rel":"nofollow","context":"In \"Computer stuff\"","img":{"src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/posts\/927","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/comments?post=927"}],"version-history":[{"count":2,"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/posts\/927\/revisions"}],"predecessor-version":[{"id":934,"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/posts\/927\/revisions\/934"}],"wp:attachment":[{"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/media?parent=927"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/categories?post=927"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/malemuk.com\/olofee\/wp-json\/wp\/v2\/tags?post=927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}