Chicken's Python Basic Learning Notes · Basic Edition

Learning knows no bounds, we will never stop.

name = input()
print(name.lower())
print(name.upper())
print(name.title())

**Convert the elements in the variable "name" to lowercase, uppercase, and title case respectively.
Example:

Input:
niuNiu

Output:
niuniu
NIUNIU
Niuniu

I am a separator~

.strip() --- remove whitespace from both ends
.lstrip() --- remove whitespace from the left end
.rstrip() --- remove whitespace from the right end
.replace(" ","") --- remove all whitespace
.split() --- split first, "".join() --- then join

Example of .join():

s1 = "-"
s2 = ""
seq = ("r", "u", "n", "o", "o", "b") # string sequence
print (s1.join( seq ))
print (s2.join( seq ))

I am a separator~

y = int(input())
y_2 = x/y
print('%0.2f'%y_2)

'%0.2f'%y_2 Take the result of y_2 and output it with two decimal places
Example:

Input: 7
Output: 3.50

I am a separator~

name = input()
str1 = input()
if name == "admis" or str1 == "Nowcoder666":
    print("Welcome!")

Custom variable format and usage example:

def hanshu(a):
    for i in a:
        print(2*int(i))

a = input().split()
hanshu(a)

Purpose: Define a function named "hanshu", pass parameters a and b to hanshu, and multiply them in the function "hanshu" and directly output the increased result

I am a separator~

A bit 'advanced' instruction:

**try ~ except ~
Purpose: Custom error display
Structure:

try:
  <block1>
except <exception type a>:
  <block2>

Example:

try:
    a = eval(input())
    print(a*2)
except NameError:
    print("asd")