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Module 1 Cheat Sheet: Python Basics

Package/Method Description Code Example

# This is a comment

Comments are lines of text that are ignored by the Python interpreter when
Comments
executing the code<./td>

Syntax:
concatenated_string = string1 + string2

Concatenation Combines (concatenates) strings.

Example:

result = "Hello" + " John"</td>

Example:
x=7
# Integer Value
y=12.4
# Float Value
is_valid = True
# Boolean Value
is_valid = False
# Boolean Value
Data Types - Integer - Float - Boolean - String F_Name = "John"
# String Value

Example:
my_string="Hello"
char = my_string[0]

Indexing Accesses character at a specific index.

len() Returns the length of a string. Syntax:

len(string_name)

Example:
my_string="Hello"
length = len(my_string)

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Example:
my_string="Hello"
uppercase_text = my_string.lower()

lower() Converts string to lowercase.

Example:
print("Hello, world")
print(a+b)

print() Prints the message or variable inside `()`.

Example:
x = 9 y = 4
result_add= x + y # Addition
result_sub= x - y # Subtraction
- Addition (+): Adds two values together. result_mul= x * y # Multiplication
result_div= x / y # Division
- Subtraction (-): Subtracts one value from another. result_fdiv= x // y # Floor Division
- Multiplication (*): Multiplies two values. result_mod= x % y # Modulo</td>
Python Operators - Division (/): Divides one value by another, returns a float.
- Floor Division (//): Divides one value by another, returns the quotient as
an integer.
- Modulo (%): Returns the remainder after division.

Example:
my_string="Hello"
new_text = my_string.replace("Hello", "Hi")

replace() Replaces substrings.

Syntax:
substring = string_name[start:end]

Slicing Extracts a portion of the string.

Example:
my_string="Hello" substring = my_string[0:5]

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Example:
my_string="Hello"
split_text = my_string.split(",")

split() Splits string into a list based on a delimiter.

Example:
my_string="Hello"
trimmed = my_string.strip()

strip() Removes leading/trailing whitespace.

Example:
my_string="Hello"
uppercase_text = my_string.upper()

upper() Converts string to uppercase.

Syntax:
variable_name = value

Variable
Assigns a value to a variable. Example:
Assignment
name="John" # assigning John to variable name
x = 5 # assigning 5 to variable x

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