Tuple Unpacking

l = ['joerg', 'flo', 'ted', 'rainer']
for element in l:
    print(element)

joerg
flo
ted
rainer

d = {
    'joerg': 54,
    'ted': 56,
    'rainer': 55,
}

for element in d:
    print(element)

joerg
ted
rainer

for key in d.keys():
    print(element)

rainer
rainer
rainer

for value in d.values():
    print(value)

54
56
55

for element in d.items():
    print(element)

('joerg', 54)
('ted', 56)
('rainer', 55)

for element in d.items():
    key = element[0]
    value = element[1]
    print(f'key: {key}, value: {value}')

key: joerg, value: 54
key: ted, value: 56
key: rainer, value: 55

for key, value in d.items():
    print(f'key: {key}, value: {value}')

key: joerg, value: 54
key: ted, value: 56
key: rainer, value: 55

t = ('joerg', 54)
name, age = t
print(f'name: {name}, age: {age}')

name: joerg, age: 54

a = 1
b = 2
a, b

(1, 2)

b, a = a, b

a, b

(2, 1)

String Methods

s = 'joerg'

s.capitalize()

'Joerg'

s

'joerg'

s.upper()

'JOERG'

s.upper().lower()

'joerg'

s.center(60)

'                           joerg                            '

s.find('rg')

3

s.find('xxx')

-1

l = ['joerg', 'faschingbauer']
'.'.join(l)

'joerg.faschingbauer'

Strings vs. Bytes

s = 'Jörg'
b = b'Joerg'

try:
    s + b
except Exception as e:
    print(type(e), e)

<class 'TypeError'> can only concatenate str (not "bytes") to str

s == b

False

7 == '7'

False