Python Formatted Output Details

Directory 1.% Format 1.1 Simple Format, without optional 1.2 Complex Format, use optional 1.2. 1 parameter (name) for selecting specified key1.2. 2 parameters flags and width, alignment and width 1.2. 3 parameter. precision controls decimal places 2. format Format 2.1 Custom placeholders 2.2 Custom keywords 2.3 Fill and align (both) 2.4 Numeric Format 3. f-String Format 3.1 Simple Use 3.2 Complex Control

1.% Formatting

Syntax:

%[(name)][flags][width].[precision]typecode

Parameters:

(name) Optional to select the specified key
flags optional, alignment, optional values:
+ means right alignment
-Indicates left alignment.
'' is a space, which means that a space is filled to the left of a positive number and a negative number is preceded by a minus sign.
Align 0 to the right, precede positive numbers with unsigned, precede negative numbers with negative signs, and fill in the blank with 0
width optional for display width
. precision optionally represents the number of decimal places
Required for typecode. The parameters you can select are:
s represents a string
d represents an integer
f denotes floating-point numbers

1.1 Simple formatting without optional parameters

print('%s The total assets of %f Yuan '%('A Company ',156261595.89))
print('%s The total assets of %d Yuan '%('A Company ',156261595.89))

Implementation results:

The total assets of A Company are 156,261,595.890, 000 Yuan
The total assets of A Company are 156,261,595 yuan

1.2 Complex formatting, using optional parameters

1.2. 1 Parameter (name) to select the specified key

d = {'name':'A Company ', 'assets':156261595.89}
print(" Company name %(name)s, Total assets are %(assets)f Yuan. " %d)

Implementation results:

The name of the company is A Company, and the total assets are 156,261,595.890, 000 yuan.

1.2. 2 Parameters flags and width, Alignment and Width

d = {'name':'A Company ', 'assets':156261595.89}
print(" Company name %(name)+6s, Total assets are %(assets)-20f Yuan. " %d)

Implementation results:

The name of the company is A Company, and the total assets are 156,261,595.890, 000 yuan.

1.2. 3 Parameters. precision controls the number of decimal places

d = {'name':'A Company ', 'assets':156261595.89345}
print(" Company name %(name)+4s, Total assets are %(assets).2f Yuan. " %d)

Implementation results:

Company name A Company, with total assets of 156,261,595.89 yuan.

2. format formatting

Functions that format strings str.format(), The basic syntax is through {} And : To implement formatting instead of the% formatting method, format Functions can accept unlimited arguments, and their positions can be out of order.

Interpretation of main parameters:
[Padding]: Character with padding after the number, only 1 character. If not specified, it will be filled with space by default
[Alignment and Width] ^, < , > They are centered, left-aligned, right-aligned, with width at the back
[Positive and negative number display] + means display + before positive number and display-before negative number; (Space) Indicates putting a space before a positive number
[Data Type] s for String d for Integer f for Floating Point Number

2.1 Custom placeholders

#  Custom placeholder 
s = '{0} The total assets of {1} Yuan '
print(s.format('A Company ','156261595.89'))

Implementation results:

The total assets of A Company are 156,261,595.89 yuan

2.2 Custom Keywords

#  Custom keywords 
s = '{name} The total assets of { Assets } Yuan '
print(s.format(name='A Company ', Assets ='156261595.89'))

Implementation results:

The total assets of A Company are 156,261,595.89 yuan

2.3 Fill and Align (both)

#  Fill and align (both) 
# : The character with padding after the number can only be 1 Characters. If not specified, it will be filled with spaces by default 
# ^, <, >  They are centered, left-aligned, right-aligned, with width at the back. 
s = '{name} The total assets of { Assets :*>20} Yuan '
print(s.format(name='A Company ', Assets =156261595.89))

Implementation results:

The total assets of A Company are ********* 156261595.89 yuan

2.4 Numeric Formatting

#  Floating point type, preserving two decimal places 
s = '{name} The total assets of { Assets :.2f} Yuan '
print(s.format(name='A Company ', Assets =156261595.8988))

Implementation results:

The total assets of A Company are 156,261,595.90 yuan

#  Floating point type, preserving two decimal places and using thousandth separator 
s = '{name} The total assets of { Assets :,.2f} Yuan '
print(s.format(name='A Company ', Assets =156261595))

Implementation results:

The total assets of A Company are 156,261,595.00 Yuan

#  Floating point type, preserving two decimal places and using thousandth separator , Indicates that the display is preceded by a positive number + Shows before negative numbers -
s = '{name} The total assets of { Assets :+,.2f} Yuan '
print(s.format(name='A Company ', Assets =156261595))

Implementation results:

The total assets of A Company are +156,261,595.00 Yuan

d = {'name':'A Company ', 'assets':156261595.89}
print(" Company name %(name)s, Total assets are %(assets)f Yuan. " %d)

0

Implementation results:

The asset-liability ratio of A Company is 85.44%

3. f-String formatting

Python Formatting string f-string , using f'{content:format}' Formatting a string where content Is to replace and fill in the contents of a string, which can be variables, expressions, functions, etc. You do not have to specify when using the default format {:format }, just write { str.format(),0 }.

3.1 Easy to use

d = {'name':'A Company ', 'assets':156261595.89}
print(" Company name %(name)s, Total assets are %(assets)f Yuan. " %d)

1

Implementation results:

The total assets of A Company are 156,261,595 yuan.

3.2 Complex Control

d = {'name':'A Company ', 'assets':156261595.89}
print(" Company name %(name)s, Total assets are %(assets)f Yuan. " %d)

2

Implementation results:

The total assets of A Company are 156,261,595.00 yuan.

Note: Filling and alignment and processing of numeric values are the same as those of format Function formatting is similar, refer to format Part of the explanation.