5 Python Tricks Every Developer Should Know

Python is one of the most versatile programming languages, loved for its simplicity and elegance. Whether you’re just starting out or you’re a seasoned developer, there are always new tricks to discover that can boost your productivity. Here are 7 Python tricks that every developer should know to write cleaner and more efficient code.

1️⃣** List Comprehensions for Clean Loops**
Instead of writing long loops to create or filter lists, you can use list comprehensions for concise, readable code.

# Traditional Loop
squares = []
for i in range(10):
    squares.append(i ** 2)
# List Comprehension
squares = [i ** 2 for i in range(10)]
print(squares)
# Traditional Loop
squares = []
for i in range(10):
    squares.append(i ** 2)

# List Comprehension
squares = [i ** 2 for i in range(10)]
print(squares)
# Traditional Loop
squares = []
for i in range(10):
    squares.append(i ** 2)

# List Comprehension
squares = [i ** 2 for i in range(10)]
print(squares)

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2️⃣ The Walrus Operator (:=)
Introduced in Python 3.8, the walrus operator allows you to assign values inside expressions, making your code more compact.

# Before
data = input("Enter a number: ")
if data.isdigit():
    print(f"You entered: {data}")
# With Walrus
if (data := input("Enter a number: ")).isdigit():
    print(f"You entered: {data}")
# Before
data = input("Enter a number: ")
if data.isdigit():
    print(f"You entered: {data}")

# With Walrus
if (data := input("Enter a number: ")).isdigit():
    print(f"You entered: {data}")
# Before
data = input("Enter a number: ")
if data.isdigit():
    print(f"You entered: {data}")

# With Walrus
if (data := input("Enter a number: ")).isdigit():
    print(f"You entered: {data}")

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3️⃣** Use zip() for Parallel Iteration**
Need to loop through multiple lists at the same time? zip() is your best friend.

names = ['Alice', 'Bob', 'Charlie']
scores = [85, 92, 78]
for name, score in zip(names, scores):
    print(f"{name} scored {score}")
names = ['Alice', 'Bob', 'Charlie']
scores = [85, 92, 78]

for name, score in zip(names, scores):
    print(f"{name} scored {score}")
names = ['Alice', 'Bob', 'Charlie']
scores = [85, 92, 78]

for name, score in zip(names, scores):
    print(f"{name} scored {score}")

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4️⃣ F-Strings for Clean String Formatting
Python 3.6 introduced f-strings, making string interpolation a breeze.

name = "Dev.to"
language = "Python"
# Old way
print("Welcome to %s, powered by %s!" % (name, language))
# With f-strings
print(f"Welcome to {name}, powered by {language}!")
name = "Dev.to"
language = "Python"

# Old way
print("Welcome to %s, powered by %s!" % (name, language))

# With f-strings
print(f"Welcome to {name}, powered by {language}!")
name = "Dev.to"
language = "Python"

# Old way
print("Welcome to %s, powered by %s!" % (name, language))

# With f-strings
print(f"Welcome to {name}, powered by {language}!")

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5️⃣** Using collections for Advanced Data Structures**
The collections module provides powerful alternatives to Python’s built-in data types. For example, defaultdict can simplify handling missing keys in dictionaries.

from collections import defaultdict
counts = defaultdict(int)
words = ["apple", "banana", "apple", "orange", "banana", "banana"]
for word in words:
    counts[word] += 1
print(counts)  # {'apple': 2, 'banana': 3, 'orange': 1}
from collections import defaultdict

counts = defaultdict(int)
words = ["apple", "banana", "apple", "orange", "banana", "banana"]

for word in words:
    counts[word] += 1

print(counts)  # {'apple': 2, 'banana': 3, 'orange': 1}
from collections import defaultdict

counts = defaultdict(int)
words = ["apple", "banana", "apple", "orange", "banana", "banana"]

for word in words:
    counts[word] += 1

print(counts)  # {'apple': 2, 'banana': 3, 'orange': 1}

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Final Thoughts
Python is packed with features that can simplify your code and make you a more efficient developer. By mastering these tricks, you’ll write cleaner, faster, and more Pythonic code.

What are your favorite Python tricks? Share them in the comments below!

原文链接： 5 Python Tricks Every Developer Should Know