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Before diving into the conversion process, it's crucial to grasp the fundamental differences and similarities between Ruby and Python. Both are high-level, dynamic programming languages, but they have distinct syntaxes and philosophies. Ruby emphasizes the principle of "developer happiness," while Python focuses on readability and simplicity.
end
to mark the end of blocks, whereas Python uses indentation.object.method
, while Python uses object.method()
, with parentheses even for methods without parameters.To start converting Ruby code to Python, you need a suitable development environment for Python:
Let’s begin by translating simple constructs like variables, loops, and conditionals.
In Ruby:
name = "John"
age = 30
In Python:
name = "John"
age = 30
The syntax is almost identical, but remember Python's strong emphasis on readability.
Ruby:
for i in (1..5)
puts i
end
Python:
for i in range(1, 6):
print(i)
Notice how Python uses range()
and indentation rather than end
.
Methods in Ruby:
def greet(name)
"Hello, #{name}"
end
puts greet("Alice")
Functions in Python:
def greet(name):
return f"Hello, {name}"
print(greet("Alice"))
Python uses the def
keyword just like Ruby but includes a colon (:
) and follows precise indentation rules.
Ruby's class structure:
class Person
def initialize(name, age)
@name = name
@age = age
end
def introduce
"Hi, my name is #{@name} and I am #{@age} years old."
end
end
person = Person.new("John", 30)
puts person.introduce
Python's class structure:
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
def introduce(self):
return f"Hi, my name is {self.name} and I am {self.age} years old."
person = Person("John", 30)
print(person.introduce())
Python uses self
to refer to instance variables and methods, and instead of new
, it directly calls the class with its parameters.
Ruby imports libraries using require
, while Python uses import
.
In Ruby:
require 'json'
data = JSON.parse('{"name": "John", "age": 30}')
In Python:
import json
data = json.loads('{"name": "John", "age": 30}')
Exception handling in Ruby:
begin
# Code that might raise an exception
rescue StandardError => e
puts e.message
end
Exception handling in Python:
try:
# Code that might raise an exception
except Exception as e:
print(e)
Ruby:
add = ->(a, b) { a + b }
puts add.call(5, 3)
Python:
add = lambda a, b: a + b
print(add(5, 3))
Ruby’s equivalent of a list comprehension:
array = [1, 2, 3, 4, 5]
squares = array.map { |num| num ** 2 }
Python's list comprehension:
array = [1, 2, 3, 4, 5]
squares = [num ** 2 for num in array]
Converting code from Ruby to Python involves understanding both the syntactical and philosophical differences between the languages. By following this guide, you can methodically translate your Ruby constructs into their Pythonic counterparts, ensuring that your code remains efficient and readable. Happy coding with your Free Ruby to Python Code Converter!
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