python formatted output, the output cycle

python formatted output, encoding cycle

pycharm installation and use
- Supporting the development of software, code line by line debugging, set the high-end, you will not, and are not prompted to debug mode at the time of writing the code, the best thing pycharm
Formatted output
- When you come across such a demand: the string you want some locations can be passed into a dynamic, first of all think of formatted output.
  Name = the INPUT ( 'Please enter the name:')
  Age = the INPUT ( 'Please enter Age: ')
  Job = iNPUT (' enter Job: ')
  Hobby = iNPUT (' enter interested: ')
  MSG =' '' ----- ----------------------- info of% S -------
  the Name:% S
  Age:% S
  Job:% S
  Hobby:% S
  ------------ -------------- End --- '' '% (name, name, Age, Job, Hobby)
  Print (MSG)
```
  在格式化输出中，如果只想表示一个"%",并不是一个占位符，只需要再加一个%
```
  msg = 'My name is% s, year% s, d %% learning progress%'% ( 'Taibai', '18', 1)
  Print (msg)
while loop
- Infinite loop (loop can be terminated)
  - Changing conditions (flags, set up the number of cycles)
  - break (out of the whole cycle)
  - continue (out of the inner loop, this loop continues out of the next cycle)
    COUNT = 0
    In Flag = True
    the while In Flag:
    COUNT = +. 1
    Print (COUNT)
    IF COUNT == 100:
    In Flag = False
- Finite loop (setting condition)
  COUNT = 0
  the while COUNT <100:
  COUNT = +. 1
  Print (COUNT)
- while,else
  - As long as the while loop is normal (not being interrupted by the break), else statement a normal print
    while loop is interrupted if the break, else statements are executed.
    COUNT = 0
    while COUNT <. 5:
    COUNT = +. 1
    IF COUNT = . 3 =:
    BREAK
    Print (COUNT)
    the else:
    Print (666666)
Operators
- Arithmetic operators (+, -)
- Comparison operators (>, <, =)
- Assignment operator (=)
- Logical operators (not, and, or)
  - In the absence (), the order of operations not> and> or, the same priority is calculated sequentially from left to right
    - Case 1: the operational sides are relatively
      print (2> 1and 3 <4 or 4> 5 and 2 <1)
    - Case 2: Both sides are integers
      x or y, x is true, the value of x, x is false, the value of Y
      Print (. 1 or 2)
      Print (or 2. 3)
      Print (-1 or 2)
      Print (0. 1 or )
      questions:
      Print (1> 2 and 3 or 6)
      results: 6
      (False or 1) output 1
      (1 or False) output 1
      (True or 1) output of the former
      (1 or True) output of the former
      (True and 1 ) which outputs
      (1 and True) which outputs
      (False and 1) output False

Encoded acquaintance

Ascii code: only contain letters, numbers, special characters; a total of eight, leftmost bit is 0; a character represents a byte
GBK: contain letters, numbers, special characters and Chinese. GB. One of the numbers, letters, special characters represents one byte; two bytes representative of a Chinese character
Unicode code (Unicode): contains all the text in the world; the beginning of a character is represented by two bytes, but it does not contain all of the text, the latter for Unicode UTF-8 is an upgrade
UTF-8: Minimum represented by eight bits (one byte) characters, European characters with two bytes, three bytes Chinese.

'China 12he': GBK: 8 bytes

'China 12he': UTF-8: 10 bytes

8bit = 1byte
1024byte = 1KB
1024KB = 1MB
1024MB = 1GB
1024GB = 1TB
1024TB = 1PB
1024TB = 1EB
1024EB = 1ZB
1024ZB = 1YB
1024YB = 1NB
1024NB = 1DB

python formatted output, the output cycle

Guess you like