Boolean String tests - Introduction to Python: Absolute Beginner Module 1 Video 20

Published: 26 July 2021
on channel: Book Simplifiers

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Concept: Boolean String Tests

Boolean string tests return Bolean True or False
methods
.isalpha()
.isalnum()
.istitle()
.isdigit()
.islower()
.isupper()
.startswith()
type str has methods that return a Boolean (True or False) for different tests on the properties of stings.

"Hello".isalpha()
out:[ ] True

.isalpha() returns True if all characters in the string ("Hello") are alphabetical, otherwise returns False

Example
Boolean String Tests
[ ] review and run code in each cell
"Python".isalpha()
"3rd".isalnum()
"A Cold Stormy Night".istitle()
"1003".isdigit()
cm_height = "176"
print("cm height:",cm_height, "is all digits =",cm_height.isdigit())
print("SAVE".islower())
print("SAVE".isupper())
"Boolean".startswith("B")
Task 2: multi-part
test stings with .isalpha()
[ ] Use .isalpha() on the string "alphabetical"

[ ] Use .isalpha() on the string: "Are spaces and punctuation Alphabetical?"

[ ] initialize variable alpha_test with input

[ ] use .isalpha() on string variable alpha_test

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