Strings

Create string

s = str()

Concatenate

s1 = str("hello ")
s2 = str("world")
print(s1 + s2)

Format

my_string = "My name is {0} {1} and I'm {2} years old.".format(first_name, name, age)

my_string = "My name is {fn} {n} and I'm {a} years old.".format(fn=first_name, n=name, a=age)

my_string = "My name is %s %s and I'm %i years old." % (first_name, name, age)

Join strings with a defined separator : join()

numList = ['1', '2', '3', '4']
seperator = ' - '
print(seperator.join(numList))

-> output :

1 - 2 - 3 - 4

With a list of separators :

s1 = 'abc'
s2 = '123'

#Each character of s2 is concatenated to the front of s1
print('s1.join(s2):', s1.join(s2))

#Each character of s1 is concatenated to the front of s2
print('s2.join(s1):', s2.join(s1))

-> output :

s1.join(s2): 1abc2abc3
s2.join(s1): a123b123c

Create a list from a string, split a a sepecific separator : split()

ma_chaine = "Bonjour à tous"
ma_chaine.split(" ")
# -> ['Bonjour', 'à', 'tous']

Lower case

s.lower()

Upper case

s.upper()