C 859: Introduction to Programming in Python

©EXAM STUDY MATERIAL 8/9/2024 11:50 AM



C 859: Introduction to Programming in
Python

Slice Notation - answer✔✔my_str[start:end]
will create a substring from my_str index start through to end - 1

Slice Notation with Stride - answer✔✔my_str[start:end:stride]

Field Width - answer✔✔minimum number of characters that must be inserted into a string
my_str='{name:16}{goals:8}'

Alignment Character - answer✔✔determines how a value should be aligned within the width of
the field
my_str='[name:<16}{goals:>8}{points:^6}'

Fill Character - answer✔✔used to pad a replacement field when the string being inserted is
smaller than the field width
{score:0>4} produces 0018

Floating-point Precision - answer✔✔format specification which indicates how many digits to the
right of the decimal should be included in the output of floating types
'{:.1f}'.format(1.725) produces 1.7

Replace (old and new parameters) - answer✔✔returns a copy of the string with all occurrences
of the substring old replaced by the string new; old and new arguments may be string variables
or string literals
phrase.replace('one', 'two') will replace any occurrence of the word one with two

Replace (old, new and count parameters) - answer✔✔returns a copy of the string with all
occurences of the substring old replaced by the new except only replaces the first count
occurrences of old
phrase.replace('one', 'two', 5) will replace any occurrances of 'one' with 'two' but will begin
looking at index 5

, ©EXAM STUDY MATERIAL 8/9/2024 11:50 AM


Find (with x variable) - answer✔✔string method that returns the index of the first occurrence of
item x in the string, else returns -1
my_str.find('!') will return the index of the '!' in the string

Find (with x, and start parameter) - answer✔✔string method that will return the index of the first
occurrence of item x in the string but will begin looking at index start
my_str.find('!', 3) will produce the index of the first ! on or after index 3

Find (with x, start and end parameter) - answer✔✔string method that will return the index of the
first occurrence of item x in the string but will begin looking at the index start and will stop at
index end -1
my_str.find('!', 3, 8) will produce the index of the first ! but will start looking at index 3 and stop
looking at index 8 - 1

Rfind - answer✔✔string method that works the same as str.find(x) but looks for the parameter in
reverse, returning the last occurrence in the string
my_str.rfind('!') will give the index of the last ! in the string

Count - answer✔✔string method that returns the number of times x occurs in the string
my_str.count('oo') will return the number of times 'oo' occurs in the string

isalnum() - answer✔✔string method that returns true if all characters in the string are lowercase
or uppercase letters or the numbers 0-9

isdigit() - answer✔✔string method that returns true if all characters are the numbers 0-9

islower() - answer✔✔string method that returns true if all cased characters are lowercase letters

isupper() - answer✔✔string method that return true if all cased characters are uppercase letters

isspace() - answer✔✔string method that returns true if all characters are whitespace

startswith(x) - answer✔✔string method that that returns true if the string starts with x

endswith(x) - answer✔✔string method that returns true if the string ends with x

capitalize() - answer✔✔string method that returns a copy of the string with the first character
capitalized and the rest lowercased

lower() - answer✔✔string method that returns a copy of the string with all characters lowercased

upper() - answer✔✔string method that returns a copy of the string with all characters uppercased