F Strings

Here’s a summary of the 5 Powerful F-String Tricks Every Python Developer Should Know from the article:

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🔑 Key Takeaways:

1. Inline Expressions F-strings allow evaluating expressions directly:

name = "John"
age = 25
print(f"{name} will be {age + 1} next year.")
# Output: John will be 26 next year.

1. Formatting Numbers Easily control decimal places, commas, and percentages:

price = 49.98765
print(f"Price: {price:.2f}")  # Output: Price: 49.99

big_number = 1000000
print(f"Formatted: {big_number:,}")  # Output: 1,000,000

score = 0.8745
print(f"Success rate: {score:.2%}")  # Output: 87.45%

1. Debugging with = Python 3.8+ supports variable name introspection inside f-strings:

x = 10
y = 5
print(f"{x=}, {y=}, {x + y=}")
# Output: x=10, y=5, x + y=15

1. Dynamic Formatting (Nesting F-Strings) Use variables inside formatting specifiers:

width = 10
number = 42.56789
print(f"{number:.{width}f}")  # Output: 42.5678900000

1. Multi-line F-Strings Use f-strings with triple quotes for readable formatted blocks:

name = "John"
age = 25
city = "New York"

info = f"""
Name: {name}
Age: {age}
City: {city}
"""
print(info)

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