C 859: Introduction to Programming in Python Exam Study Guide

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C 859: Introduction to Programming in
Python Exam Study Guide

Slice Notation - ✔️✔️my_str[start:end]


will create a substring from my_str index start through to end - 1


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


Field Width - ✔️✔️minimum number of characters that must be inserted into a string


my_str='{name:16}{goals:8}'


Alignment Character - ✔️✔️determines how a value should be aligned within the width of

the field


my_str='[name:<16}{goals:>8}{points:^6}'


Fill Character - ✔️✔️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 - ✔️✔️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



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Replace (old and new parameters) - ✔️✔️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) - ✔️✔️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


Find (with x variable) - ✔️✔️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) - ✔️✔️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) - ✔️✔️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




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