It 140 introduction to scripting v3 home

3/26/2021 IT 140: Introduction to Scripting v3 home
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Special cases
The number of columns of text considered to be acceptable varies from 80 to 120. Good practice is to
use the widely accepted standard of 80 columns. A few exceptions to the rules of indentation deal
with very long statements that require more than one line and wrap to the next line. Such special
situations do not indicate new code blocks.
Figure 3.8.2: Some indentations are continuations of the previous line.
Multiple lines enclosed within parentheses are implicitly joined into a single string (without
newlines between each line); use implicit line joining for very long strings or functions with
numerous arguments. Ex: All extra lines are indented to the same column as the opening
quotation mark on the ±rst line.
When declaring list or dict literals, entries can be placed on separate lines for clarity.
declaration = ( "When in the Course of human events, it becomes necessary for "
"one people to dissolve the political bands which have connected "
"them with another, and to assume among the powers of the earth..." )
result_of_power = math . pow ( long_variable_name_left_operand ,
long_variable_name_right_operand )
Figure 3.8.3: List, dict multi-line constructs.
Containers like lists and dicts can be broken into multiple lines, with the elements on
separate, indented lines.
my_list = [
1 , 2 , 3 ,
4 , 5 , 6
]
my_dict = {
'entryA' : 1 ,
'entryB' : 2
}
PARTICIPATION
ACTIVITY
3.8.1: Indentation.
1)
The standard number of spaces to use
for indentation is 4.
©zyBooks 03/26/21 10:57 925595
harley smith
SNHUIT140v3
©zyBooks 03/26/21 10:57 925595
harley smith
SNHUIT140v3

3/26/2021 IT 140: Introduction to Scripting v3 home
2)
Mixing spaces and tabs when
indenting is considered an acceptable
programming style.
True
False
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3)
A programmer can start new code
blocks at any point in the code, as long
as the indentation for each line in the
block is consistent.
CHALLENGE
ACTIVITY
3.8.1: Indentation: Fix the program.
Retype the below code. Fix the indentation as necessary to make the program work.
if 'New York' in temperatures:
if temperatures['New York'] > 90:
print('The city is melting!')
else:
print('The temperature in New York is', temperatures['New
York'])
else:
print('The temperature in New York is unknown.')
Sample output with input: 105
The city is melting!