Example
The global Keyword
The global keyword allows modifying a global variable inside a function.
Results for “difference”
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Example
Iterating Over Dictionary
Looping through keys, values or key-value pairs of a dictionary.
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Example
Creating Lists
Lists store multiple elements in a specific order. Basics of working with lists.
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Example
Order of Operations
Order of operations in Python. Parentheses, exponents, multiplication, division, addition.
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Challenge
Read the error
…of log Run, read, fix, repeat Day 3 has two mistakes, on different lines. Python reports only the first one it finds, so after you fix it and run again, a different error appears, on a different line…
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Challenge
Waypoint distance
…between two points comes from Pythagoras: square the differences in x and in y, add them, and take the square root. Distance A to B: 600.0 m ** raises a number to a power: dx ** 2 is dx squared, and…
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Challenge
Mass by category
…weighs, because food, life support and spares go into different racks with different mass limits. Total the manifest by category, then rank the categories by mass. A total per category Add up the mass…
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Challenge
Mission config
…and whether this is only a dry run. Each setting is a different kind of value, and Python treats each kind differently. This challenge works in three steps. First you predict what some code prints and…
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Challenge
Environment check
…starts with that line, because the same code can behave differently in different versions. Python can tell you itself. Write the first lines of a bug report for the Python One flight software, filled…
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Article Python Fundamentals
Nested Loops in Python
…text list. Both do the same scanning, just display results differently. Common Beginner Mistakes Mistake 1: Same Variable Names # BAD - inner loop overwrites x! for x in range(3): for x in range(3): #…
