Find repeated words
Write a Python program to find accidentally repeated words like "the the". Step-by-step explanation, colour-coded code and real output.
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1,137 articles · page 3 of 95 · Clear filtersValidate an IPv4 address
Write a Python program to check IPv4 addresses (each part 0-255). Step-by-step explanation, colour-coded code and real output.
camelCase to snake_case
Write a Python program to convert camelCase names to snake_case. Step-by-step explanation, colour-coded code and real output.
Mask card numbers
Write a Python program to mask all but the last 4 digits of card numbers. Step-by-step explanation, colour-coded code and real output.
Parse log lines with named groups
Write a Python program to parse "LEVEL date message" log lines into dictionaries. Step-by-step explanation, colour-coded code and real output.
Match whole words only
Write a Python program to count the word "test" but not "testing" or "latest". Step-by-step explanation, colour-coded code and real output.
Split on several delimiters
Write a Python program to split text on commas, semicolons and spaces. Step-by-step explanation, colour-coded code and real output.
Remove special characters
Write a Python program to remove everything except letters, digits and spaces. Step-by-step explanation, colour-coded code and real output.
Collapse extra spaces
Write a Python program to replace runs of whitespace with a single space. Step-by-step explanation, colour-coded code and real output.
Extract URLs
Write a Python program to extract http and https URLs from text. Step-by-step explanation, colour-coded code and real output.
Extract hashtags and mentions
Write a Python program to extract hashtags and @mentions from a tweet. Step-by-step explanation, colour-coded code and real output.
Extract dates
Write a Python program to extract dates in DD-MM-YYYY format and print them as YYYY-MM-DD. Step-by-step explanation, colour-coded code and real output.
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