Cheatography
https://cheatography.com
Python reference for the stuff Eric has trouble remembering.
This is a draft cheat sheet. It is a work in progress and is not finished yet.
String Methods
capitalize() |
Capitalizes first letter of string |
center(width) |
String is centered within X characters |
endswith(sub) |
True if string ends with substring |
expandtabs(width) |
Turns \t into X blank spaces |
find(sub, start, end) |
Can just put in string as variable to find loc |
index(sub start end) |
Finds the index of a list or string |
isalnum() |
True if only letter or number (no spaces) |
isalpha() |
True if it's a letter |
isdigit() |
True if a number |
islower() |
True if all lowercase |
isspace() |
True if a space exists in the string |
istitle() |
True if first letter of each word is capitalized |
isupper() |
True if all of string is upper case |
join() |
':'.join(list) would combine all with ':' |
replace(old, new) |
Replaces all instances of old with new |
startswith(sub) |
True if string starts with substring |
rpartition(sub) |
Turns string into 3 part tuple based on substr |
Threading w/Threading Module
import threading |
t = threading.Thread(
target=func, args=(arg1,)) |
t.start() |
Start the thread right after threading.Thread |
threads.append(t) |
Appends thread to your defined list for sync |
for threads in threads:
threads.join() |
Joins threads so they end at same time |
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Datetime Module
import datetime |
datetime.today().weekday() |
Returns 0 thru 6. 0 is Monday |
datetime.today().isoweekday() |
Returns 0 thru 6. 1 is Monday |
datetime.datetime.today()
.strftime('%A') |
Returns name for day of the week |
datetime.datetime.now()
.strftime("%H:%M:%S") |
Returns hour minute and second of current time |
datetime.datetime.now() |
Datetime object of current time |
Find time between two datetime objects
import datetime |
first_time = datetime.datetime.now() |
later_time = datetime.datetime.now() |
difference = later_time - first_time |
seconds_in_day = 24 * 60 * 60 |
divmod(difference.days * seconds_in_day + difference.seconds, 60) |
Returns a tuple of minutes comma seconds ex. (8, 0) |
sys.argv for python foo.py bar -c qux --h
sys.argv[0] |
foo.py |
sys.argv[1] |
bar |
sys.argv[2] |
-c |
sys.argv[3] |
qux |
sys.argv[4] |
--h |
os Module
os.path.isdir(loc) |
True if loc is a directory |
os.path.isfile(loc) |
True if loc is a file |
os.path.normpath(loc) |
Gives path normalized for Win * |
* Removes redundant separators and up-level references |
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Django Module
pip install Django |
External module |
django-admin startproject mysite |
Starts a new project folder called mysite |
python manage.py runserver [ip][:port] |
Runs the project stuff in brackets is optional |
python manage.py startapp blog |
Creates application in your project folder called blog |
python manage.py makemigrations blog |
Propagates blog app changes to database |
python manage.py migrate |
Syncs database with new model |
python manage.py createsuperuser |
Creates a superuser, prompts will follow |
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