Bookmarks (27) clear filters

Double Precision Is Different in Different Languages Representing numbers on a computer can be challenging. Understanding how representations get printed is also a challenge! STACK OVERFLOW

Why Is Plus-Equals Valid for List and Dictionary? The docs for the .__iadd__() special method don’t make it clear why it works for collections like lists and dictionaries. Time to peruse some CPython source code! STACK OVERFLOW

Why Does Python Detect the Symbol “²” as a Digit? TIL that .isdigit() works with superscripts STACK OVERFLOW

How Can I Generate Three Random Integers That Satisfy Some Condition? A little bit of algebra goes a long way. But also, when was the last time you got to use SciPy’s Diophantine equation solver? STACK OVERFLOW

Why Doesn’t Python Give Any Error When Quotes Around a String Do Not Match? How well do you know your quotes? STACK OVERFLOW

Why Does np.inf // 2 Result in NaN and Not Infinity? Wait, can you even divide infinity by anything? STACK OVERFLOW

How Can I Accept and Run User’s Code Securely on My Web App? Not with eval() STACK OVERFLOW

Why Do NaN Values Make min() and max() Sensitive to Order? How NaNs compare to numerical values and the implications of that in min() and max() might be surprising. STACK OVERFLOW

Why Is math.sqrt Massively Slower Than Exponentiation? Is it, though? The square root of 2 might not be a good value for timing comparisons. STACK OVERFLOW

What Is the Purpose of Floating Point Index in Pandas? Considering issues like floating-point representation error, is it ever a good idea to use a float as an index? STACK OVERFLOW

Does Python Forbid Two Similarly Looking Unicode Identifiers? Set 𝑓 = 1729. Now print(f) prints 1729! Excuse me, but I have questions! STACK OVERFLOW

How Do You Get the Count for Each Item in a List of Lists? collections.Counter and itertools to the rescue! STACK OVERFLOW

Classifying Values Based on Ranges That Contain Them Avoid big if/else blocks by using the bisect module! STACK OVERFLOW

Can You Change the Value of the Integer 1 in Python? Spoiler alert: yes! But you probably shouldn’t do that. STACK OVERFLOW

Renaming Months From Number to Name in Pandas In a DataFrame indexed by month and day, how do you change the month index from numbers, like 1, to a name, like Jan? STACK OVERFLOW