/python-learning

Primary LanguagePython

python-learning

Git:

  • Neue Order erstellen
mkdir src
  • neue Datei mit der Name first_programm.py in Ordner src in visual studio code erstellen
  • in git auf console: 
    git add src
git add src/first_programm.py
git commit src -m "initial"
git commit src src/first_programm.py -m "initial"
git push
  • Dateien abgleichen 
    git pull

Create Number with range

numbers = list(range(1,20,2))
print(numbers)

Repeating the element multiple times

numbers = [3, 7, 12]
multi = numbers*5

Using Conditions in Ternary Operator

consume = 25000
print("Hight") if consume > 50000 else print("Low")

Regular Expressions

findall

import re

msg = "completely refer 12345 bright pick town 42 money market task finger 4711 television pine herself personal fish ability pound industry torn potatoes indeed easier happened shake biggest"
pattern = "\d+"

result = re.findall(pattern, msg)
print(result)

Search

text = "Content: hall dog kind pony frozen population mother continued captain spell furniture prepare student development draw pull children rice remember crowd stock identity blind he"
# checking if 'Content' is present at the beginning
match = re.search('\AContent', text)

print('Search: Found') if match else print('Search: Not found')

split

text = "discuss sight 4711 tongue radio help current throw bright rear else 42 capital both north produce did done greatly shop been 7 tall jungle think floor major"
pattern = "\d+"

result = re.split(pattern, text)
print(f'split::result: {result}')

sub

text="wear helpful floating additional fix constantly slept attempt breakfast teeth serious action comfortable with poet finish concerned continued those shore probably per bad add"
# replacing whitesspace characters with ';'
result = re.sub("\s", ";", text)
print(f'sub::result: {result}')

subn

text="dinner fix ourselves fat army my particularly rhythm hospital selection perhaps wait citizen combine child eaten route club include worth zero people equipment bear"
pattern = "en"
result = re.subn(pattern, "EN", text)

print(f'subn::result: {result}')

Simplify sequence check

  1. Way:
if len(list_of_some_things) > 0:
    one_thing = chooose_thing(list_of_some_things)
  1. Way:
if list_of_some_things:
    one_thing = chooose_thing(list_of_some_things)

Use Any instead of Loop

  1. Normal:
things = [1,3,4,5,9, 10, -3, -21]
flag = False
for num in things:
    if num < 0:
        flag = True
        break
  1. Pythonic
things = [1,3,4,5,9, 10, -3, -21]
flag = any(things < 0 for num in things)

Adding a Guard Clause

  1. Normal:
def do_i_need_hat(self, hat):
    if isInstance(hat, Hat):
        weather_outside = getWeatherReport()
        if weather_outside.is_raining:
            print("Yes")
            return True
        else:
            return False
    else:
        return False
  1. Better:
def do_i_need_hat(self, hat):
    if not isInstance(hat, Hat):
        return False
if isInstance(hat, Hat):
        weather_outside = getWeatherReport()
        if weather_outside.is_raining:
            print("Yes")
            return True
        else:
            return False