2022.6.21 Python review course

Several functions mentioned

1. strip
   Remove the specified character or character sequence at the beginning and end of the string

2. type
   The data type of the output variable

3. count
   Statistics specify the starting point or the ending point , The number of occurrences of a character or substring

4. insert
   Inserts the specified object into the list at the specified location

5. sep
   Custom delimiter , Commonly used in print Function

Programming questions

1. Read in sequence 4 Students' grades and average

score = []
avg = []
for i in range(0, 4):
score.append([0] * 3)
for i in range(0, 4):
for j in range(0, 3):
score[i][j] = int(input())
avg[i] += score[i][j]
for i in range(0, 4):
print(avg[i])

2. Judge leap year or normal year

year = int(input("Please input a year"))
if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:
print(year,' It's a leap year ')
else:
print(year,' It's the year of the year ')

3. Write a function , Exchange the values of two variables

def swap(a, b):
t = a
a = b
b = t
print(a, b)

4. Print number of daffodils

for x in range(1, 10):
for y in range(0, 10):
for z in range(0, 10):
s1 = x * 100 + y * 10 + z
s2 = x**3 + y**3 + z**3
if s1 == s2:
print(s1)

5. Create a text file , And write string , Then save it

file = open('C:/a.txt','w+')
a = "123456"
file.write(a)
file.close()