Oneshot Python
Here are some basics of Python programming that you may find useful:
Variables: Variables are used to store values in Python. You can create a variable by assigning a value to it using the = operator. For example:
x = 10 y = "hello"
Data types: Python has several built-in data types, such as integers, floating-point numbers, strings, and booleans. You can use the type() function to determine the data type of a value. For example:
x = 10 print(type(x)) # Output: <class 'int'> y = "hello" print(type(y)) # Output: <class 'str'>
Control structures: Python has control structures like if statements and for loops that allow you to control the flow of your program. For example:
x = 10 if x > 5: print("x is greater than 5") for i in range(5): print(i)
Functions: Functions are blocks of code that can be called by name. You can define a function in Python using the def keyword, and call it by using its name followed by parentheses. For example:
def greet(name): print("Hello, " + name) greet("Alice") # Output: Hello, Alice greet("Bob") # Output: Hello, Bob
Lists: Lists are ordered collections of values. You can create a list by enclosing a comma-separated sequence of values in square brackets. You can access the elements of a list using their index, which starts at 0. For example:
fruits = ["apple", "banana", "cherry"] print(fruits[0]) # Output: apple print(fruits[1]) # Output: banana print(fruits[2]) # Output: cherry
Dictionaries: Dictionaries are collections of key-value pairs. You can create a dictionary by enclosing a comma-separated sequence of key-value pairs in curly braces. You can access the values of a dictionary using their keys. For example:
ages = {"Alice": 25, "Bob": 30, "Charlie": 35} print(ages["Alice"]) # Output: 25 print(ages["Bob"]) # Output: 30 print(ages["Charlie"]) # Output: 35
Importing modules: You can import libraries and modules into your Python code using the import keyword. For example, to import the requests and beautifulsoup4 libraries, you would use the following code:
import requests import beautifulsoup4
Exceptions: Exceptions are errors that occur during the execution of a program. You can handle exceptions in Python using try and except statements. For example:
try: x = 10 / 0 except ZeroDivisionError: print("Division by zero is not allowed")
These are just a few of the basic concepts of Python programming that you will need to know to create a web scraper. There are many other features and libraries available in Python that you can learn as you continue to develop your project.