Python path--python should I format the string using% or format?

One,%, or format1,%, Format Imperial PK

The format string in Python currently has two camps:% and format, which one should we choose?

Since Python2.6 introduced the format-formatted string method, I think the% or format is not a problem at all. Don't believe you look down.

# define a coordinate value c = (+)#  use% to format " enemy Coordinates:%s" % c

The above code obviously throws a typeerror like this:

Typeerror:not all arguments converted during string formatting

Like this kind of formatting needs we need to write the following ugly format:

# define a coordinate value c = (+)#  Use the% ugly formatting ... " enemy Coordinates:%s " % (c,)

There is no problem with format:

# define a coordinate value c = (in.)#  format " Enemy Coordinates: {}"with format. Format ( C

Obviously, the above reason is enough for you to use format for future projects.

2. New Features

Added f-strings to Python3.6:

" Q1mi " in[2]: Age =in[3]: F'My name is {name}. I ' m {age}"out["My name is Q1mi.i ' m "

second, the usual format usage1, through the location

IN[1]: data = ["q1mi",]in["name:{0}, age:{1}". Format (*data) out['name:q1mi, age:18'

2, through the key words

IN[1]: data = {"name""Q1mi" "Age" :}in["name:{name}, age:{age}". Format (* *data) out['  name:q1mi, age:18'

3. Through object Properties

IN[1]:classPerson (Object): ...:def __init__(self, Name, age): ...: Self.name=name ...: self.age=Age ...:def __str__(self): ...:return "This was {self.name}, {self.age}, years old.". Format (self=Self ) ...: in[2]: p = person ("Q1mi", 18) in[3]: str (p) out[3]:'This was q1mi, years old.'

4, through the subscript

" {0[0]} is {0[1]} years old. " . Format (data) out['q1mi is the years old. '

5. Fill and alignpadding is used in conjunction with alignment

• ^, <, > center, Align Left, right, back with width
• : The filled character after the number, only one character, not specified by default is filled with spaces.

IN[1]:"{: >10}". Format (' -') out[1]:' -'in[2]:"{: 0>10}". Format (' -') out[2]:'0000000018'in[3]:"{: a>10}". Format (' -') out[3]:'AAAAAAAA18

Add a string that comes with the Zfill () method:

The Python Zfill () method returns a string of the specified length, the original string is right-aligned, and the front padding is 0. Zfill () method Syntax: Str.zfill (width)parameter width Specifies the length of the string. The original string is right-aligned with the front padding 0. returns a string of the specified length.

"  - ". Zfill (Ten) out['0000000018'

6. Accuracy and type F

Accuracy is often used in conjunction with Type F.

" {:. 2f} ". Format (3.1415926) out['3.14'

Where. 2 represents a precision of 2 length, and F represents a float type.

7. Other binary

B, D, O, and X are binary, decimal, octal, hexadecimal, respectively.

IN[1]:"{: b}". Format (18) out[1]:'10010'in[2]:"{:D}". Format (18) out[2]:' -'in[3]:"{: o}". Format (18) out[3]:' A'in[4]:"{: x}". Format (18) out[4]:' A'

8. Thousand separators

" {:,} ". Format (1234567890) out['1,234,567,890'

Python path--python should I format the string using% or format?