Use code to help you understand the basics of Python (1)

# Data Type:# 1. Integer: Integers of any size can be processed in PythonintNum1 = 584520
intNum2 = -100
score = 100
# 2. Floating point number: that is, decimal numberfloatNum1 = 3.1415926
floatNum2 = 1.23e10			# Scientific notation# 3. String: Text enclosed with single or double quotesstr1 = '584520JD'
str2 = "584520JD"
str3 = "Hello Python."
# 4. Escape characters: \nBreak, \tTab, \\ for itselfprint("Hello Willard.\n")
print("Welcome to FUXI Technology.")
# 5. Boolean: True and Falsebool1 = True
bool2 = 2 > 1	# Output True# 6. Null value: None, and 0 are not equivalent# Variables and constants:# a. Variable naming: Variable names are a combination of upper and lower case letters, numbers and _, but cannot start with numbers;# b. Format: variable_name = variable_value, equal sign = is the assignment symbol;# c. Constant: variable that cannot be changed, usually using all capital variable names to represent constantsPI = 3.1415926

# Example 1:# Example:student_name = input("Please enter your name:")
score = int(input("Please enter your score(0-100)："))
NAME = "willard"
if student_name == NAME:
    if ((score > 100) or score < 0):
        print("The score you entered is wrong! Please re-enter!")
    else:
        print("Your score is %d" % score)
else:
    print("Your name is entered incorrectly, please re-enter!")

# Case 1: The input is completely correct outputPlease enter your name：willard
Please enter your score(0-100)：100
Your score is100
# Case 2: Output with incorrect name inputPlease enter your name：Willard
Please enter your score(0-100)：59
Your name is entered incorrectly，Please re-enter！
# Case 3: The output with incorrect score inputPlease enter your name：willard
Please enter your score(0-100)：101
The score you entered is incorrect！Please re-enter！

# string:# 1. String definition: enclose in single or double quotes;# 2. Get the integer representation of characters: ord() function;# 3. Convert the encoding to the corresponding characters: chr() function;# 4. The type of string is: str;The string type in # is str, represented by Unicode in memory, and one character corresponds to several bytes;# 6. If you want to transfer or save it to disk on the network, you need to turn str into bytes in bytes;# 7. The str represented by Unicode is encoded as specified bytes through the encode() method;# 8. If you read byte streams from the network or disk, the data you read is bytes; you need to use the decode() method to turn bytes into str;# 9. Calculate the string length: len() function;# 10. Tell Linux system that this is a Python executable function, add the following line to the program header#!/usr/bin/env python3
# 11. Tell the Python interpreter to read the source code according to utf-8 encoding, and add the following line to the program header#-*- coding:utf-8 -*-

#Practical combat 1:# 1. String definitionstudentOne = 'Willard'
studentTwo = "ChenJD"
print("The name of first student is：",studentOne)
print("The name of second student is：",studentTwo)
print("----------------------------------------------")
# 2. Get the integer representation of characters: ord() functionchar1 = 'A'
print("The integer of the character A is represented as:",ord(char1))
print("----------------------------------------------")
# 3. Convert the encoding to the corresponding characters: chr() functionint1 = 97
print("97 corresponding characters are:",chr(int1))
print("----------------------------------------------")
# 4. String type: type() functionstudentName = "FUXI"
print("The type of string is:",type(studentName))

#Practical combat 2:# 5. Turn str into bytes in bytesprint("'Willard' becomes bytes in bytes:",'Willard'.encode('ascii'))
print("'China' becomes bytes in bytes:",'China'.encode('utf-8'))
print('----------------------------------------------------------------')
# 6. Turn bytes into strprint("b'Willard' changed from bytes to str:",b'Willard'.decode('ascii'))
print("b'\\xe4\\xb8\\xad\\xe5\\x9b\\xbd' changed from bytes to str:",b'\xe4\xb8\xad\xe5\x9b\xbd'.decode('utf-8'))

# Practical 3: Confession secret wordsyourWord = input("Please enter the words you want to convert to secret words:")
cryptolalia = ('utf-8')
print("Your secret word has been generated, please check it!\n",cryptolalia)

# Output result:Please enter the words you want to convert to secret language：I love you，Chen Jindi
Your secret word has been generated，Please check！
 b'\xe6\x88\x91\xe7\x88\xb1\xe4\xbd\xa0\xef\xbc\x8c\xe9\x99\x88\xe9\x87\x91\xe5\xa8\xa3'
----------------------------------
Please enter the words you want to convert to secret language：I love you，China！
Your secret word has been generated，Please check！
 b'\xe6\x88\x91\xe7\x88\xb1\xe4\xbd\xa0\xef\xbc\x8c\xe4\xb8\xad\xe5\x9b\xbd\xef\xbc\x81'

#Practical combat 4:# 6. Calculate string lengthstrOne = "Hello,Welcome to FUXI Technology."
strOneLen = len(strOne)
print("The length of the string %s is:"%(strOneLen))
print("-------------------------------------------")
# Compare the lengths of two namesnameOne = input("First classmate, please enter your name:")
nameTwo = input("Second classmate, please enter your name:")
nameOneLen = len(nameOne)
nameTwoLen = len(nameTwo)
if (nameOneLen > nameTwoLen):
    print("The first classmate's name is longer!")
elif (nameOneLen == nameTwoLen):
    print("The names of the two classmates are the same long!")
else:
    print("The second classmate's name is longer!")

# Format:# Format method 1:# % is used to format strings# Inside the string, %s means replaced with a string, and %d means replaced with an integer# How many %? placeholders are there, and they need to be followed by several variables or values, which need to be corresponding.# Common placeholders:# %d: integer placeholder; %f: floating point placeholder;# %s: string placeholder; %x: hexadecimal integer placeholder;# %%: means one %;# Format method 2:# format(): Replace the placeholders {0}, {1}, and sequentially in the string with the passed parameters...

#Practical combat 5:print("The following is the personal information registration form, please fill in it truthfully!")
print("------------------------------------")
name = input("Please enter your name:")
sex = input("Please enter your gender(male/female)：")
age = int(input("Please enter your age:"))
qq = input("Please enter your QQ number:")
print("------------------------------------")
print("Please check again whether the following information is filled in correctly!")
print("Your name is: %s"%name)
print("Your gender is: %s"%sex)
print("Your age is: %d"%age)
print("Your QQ number is: %s"%qq)
print("-------------------------------------")
print("If the above information is correct, please submit it, thank you for filling it out!")

print("The following is the personal information registration form, please fill in it truthfully!")
print("------------------------------------")
name = input("Please enter your name:")
sex = input("Please enter your gender(male/female)：")
age = int(input("Please enter your age:"))
qq = input("Please enter your QQ number:")
print("------------------------------------")
print("Please check again whether the following information is filled in correctly!")
print("Your name is：{0}；gender：{1}".format(name,sex))
print("Your age is：{0}；QQNumber：{1}".format(age,qq))
print("-------------------------------------")
print("If the above information is correct, please submit it, thank you for filling it out!")