Python Strings

Post Date : 2024-06-08T11:33:51+07:00

Modified Date : 2024-06-08T11:33:51+07:00

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A sequence and ordered of characters, a string will be started and end with single quote or double quote

Create a string

a_string = "A python's string"
another_string = 'Another "python" string'
# multiline string
email_content = """
This is
"""

Access elements in a string

alphabet = "abcdefg"
print(alphabet[0] == "a")  # a
print(alphabet[-1] == "g")  # g
print(alphabet[0:2] == "ab")  # ab
print(alphabet[1:] == "bcdefg")  # bcdefg
print(alphabet[0:-2] == "abcde")  # abcde
print(alphabet[::] == "abcdefg")  # abcdefg

another_alphabet = alphabet[:]
print(another_alphabet == "abcdefg")

Format a string

String interpolation

Add a “f” as a prefix before a string, so that you can wrap your variable inside the curly braces - {yourVariable}

name = "Python2024"
target = "beginners"
print(f"This is {name} course for {target}\n")

String format

Use the curly braces as a place holder of your variable inside a string.

print("This is {} course for {}\n".format(name, target))

% Operator

An old way to format your string in python

print("This is %s course for %s" % (name, target))

We can also use expressions inside the curly braces

x, y = 1, 2
print(f"{x} + {y} = {x+y}")

Raw string

print(r"C:\workplace\nestjs")
# Output: C:\workplace\nestjs

Let’s play with string

alphabet = "abcdefghijklmnopqrstuvwxyz"
print(f"{alphabet[0]}:{len(alphabet)}")
print(f"{alphabet[-1]}")

# find
print(alphabet.find("M"))

# replace
alphabet = alphabet.replace("m", "M")
print(alphabet)

# slicing
print(alphabet[0:5])

# split
print("a,b,c,d,e,f".split(","))

# strip
print(len(" a ".strip()))
print(len("    a     ".strip()))

# upper
print(alphabet[1].upper())

Feel free to run these examples at Python String