C859 Python exam 2022/2023

C859 Python exam test 2022
f1 = open("/my path/my_file.text", "r") - to open and read a file

f1 = open("/my path/my_file.text", "w") - to open and write a file
(all previous material discarded)

f1 = open("/my path/my_file.text", "a") - to open and add to a file

f1.read() - read a file into a string

f1.write("hello!") - writes to a file

f1.readline() - reads next line

f1.close() - closes a file (must always close a file!)

with open("/my file...etc.) as f: - opens, allows work, and
automatically closes a file

timedelta - time library function to calculate time amounts

from date time import time delta - grabs time delta from the
datetime library

import datetime as do - imports a library as a specified variable

datetime.date.today().month - to print current month (aka .day or
.year for those)

beautiful soup - HTML parsing library

NumPy - scientific computing, matrices, array creation library

, pandas - data manipulation and analysis library

pillow (PIL) - work with and manipulate images; python imaging
library

pyglet - multimedia / gaming creation library

pits - time zone data library

pip install ____________ import _______________ - to install
and import a library into your code

math.ceil() - round down (4.5 = 4, 4.8 = 4, 4.1 = 4, 4.9 = 4)

math.floor() - round up (4.6 = 5, 4.7 = 5, 4.1 = 5, 4.2 = 5)

datetime.date.today() - get today's date

datetime.date.(1967, 9, 7)
print(mybday.strftime("%A")) - gets the day of the week

math.factorial() - multiplies each number in argument to give
answer

math.exp() - return e raised to power of (x) (natural log)

math.sqrt() - return square root of x

os.link() - create a hard link pointing to a source

os.getcwd() - returns string of current working directory

os.chroot() - change the root directory of current process path