Learning notes for Python/001 (2018-5-14)

1.Character encoding
ASCLL yards
7,445 characters and characters are included in GB2312;
21,886 characters and characters are included in GBK1.0;
27,484 characters and characters are included in GB18030;
Unicode
Utf-8 is the unified standard of internationalization, (variable long character set) rules in English with 1byte, Chinese characters are expressed in 3bite;

2.comment statements in Python
(1) Single-line comment #----------comment/explanatory statement---------------------
(2) Multi-line Comment "----------comment/explanatory statement---------------------" "or
""----------Comment/Interpretation statement---------------------"" "

3. Three common methods for formatting output
(1)
Name=input ("Name:")
Age=input ("Age:")
Job=input ("Job:")
Salary=input ("Salary:")

Info= ""
------------Info of%s---------------
name:%s
age:%s
jod:%s
salary:%s
"% (Name,name, age,job,salary)
Print (info)

Name=input ("Name:")
Age=int (Input ("Age:")) # is used to force the default string type of age to be converted to an integer type
Job=input ("Job:")
Salary=input ("Salary:")

Info= ""
------------Info of%s---------------
name:%s
age:%d # where the difference lies
jod:%s
salary:%s
"% (Name,name, age,job,salary)
Print (info)

(2)
Name=input ("Name:")
Age=input ("Age:")
Job=input ("Job:")
Salary=input ("Salary:")
info = ""
----------info of {_name}-------------
Name:{_name}
Age:{_age}
Job:{_job}
Salary{_salary
". Format (_name=name, # The difference is that there is no need for one by one correspondence, only choose the function name of the set to correspond well;
_age=age,
_job=job,
_salary=salary)
Print (info)

4. User Name Module
Import Getpass (modules present in the standard library)

Password=getpass.getpass ("Password:")

It is not allowed to run in the Pycharm;

5. Types of circular statements
(1) If-else and If-elif

_passname= ' Penny '
_password= ' abc123 ' # here has already put the username and user password dead, can be optimized in the later learning

Passname=input ("Pass Name:")
Password=input ("Pass word:")

**if _passname==passname and _password==password:
Print ("Welcome {name} loding ...". Format (Name=passname)) # formats (A=B) are designed to introduce variables in the output
Else
Print ("Invarild Pass name or pass word")

Age_of_penny=23
Age=int (Input ("age") # Forced conversion type, input default type is a string character type, forced to convert to int type;
If age_of_penny==age: # note = the difference between = = = Pay special attention to
Print ("You thinking are right")
Elif Age_of_penny < age:
Print ("Thinking smaller ...")
Else
Print ("Thinking bigger ...")

(2) while and While-else

Age_of_penny=23
Count=0
While Count<3: # optimizes the input process,
age = Int (input ("age"))
If Age_of_penny==age:
Print ("You thinking are right")
Break
Elif Age_of_penny < age:
Print ("Thinking smaller ...")
Else
Print ("Thinking bigger ...")
Count+=1
If count==3:
Continue_input=input ("Does want do many guessing?" ")
If continue_input! = ' No ':
Count=0 # continues to initialize count to 0, you can continue to do the above; note the difference between = and = =

Age_of_penny=23
Count=0
while count<3: # optimizes the input process,
age = Int (input ("age"))
If Age_of_penny==age:
Print ("You thinking are right")
Break
Elif Age_of_penny < age:
Print ("Thinking smaller ...")
Else
Print ("Thinking bigger ...")
Count+=1
Else
Print ("You have tried too many times")

(3) For loop

For j in range (10)
Print ("Loop", i)

For-else He was executed after the principal loop for the for, after executing the else

For j in Range (0,10,2) where 2 is the word length,

6Some small areas of Python to note
(1)%s%d

(2)
Print (Type (----))
Print (Type (---), type (str (---)) # prints the converted Type

(3) _name=penny #变量
_name= ' Penny ' #赋值

(4)
Break ends The current loop
Continue jump out of this cycle and into the next cycle

Learning notes for Python/001 (2018-5-14)