Python control syntax (memories)

A memorandum around Python's control syntax. We will make additions and corrections as needed.

Comparison operator

if

num = 5
if num == 0:
    print('The number is 0')
elif num < 0:
    print('Number is less than 0')
else:
    print('Number is greater than 0')

while

limit = input('Enter:') #Accept input
count = 0
while True:
    if count >= limit:
        break #If count is 10 or more, exit the loop

    if count == 5:
        count += 1
        continue #If count is 5, go to the next loop

    print(count)
    count += 1
else: #Execute when the loop ends without breaking
    print('Done')

for

for i in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]:
    if i == 5: #If i is 5, go to the next loop
        continue:

    if i == 8: #If i is 8, exit the loop
        break:

    print(i)
#Execute when the loop ends without breaking
else:
    print('Done')

#When you want to process a specified number of times but do not need to retrieve the value_To use
for _ in range(10):
    print('hello')

#Process until it exceeds 10 by skipping 2 to 3
for i in range(2, 10, 3):
    print('hello')

#If you also want to get the index
for i, animal in enumerate(['dog', 'cat', 'bird']):
    print(i, animal)

#When you want to expand and get multiple lists at the same time
animals = ['dog', 'cat', 'bird']
foods = ['meat', 'fish', 'bean']
for animal, food in zip(animals, foods):
    print(animal, food)

#Dictionary loop processing
data = {'x': 10, 'y': 20}
for k, v in d.items():
    print(k, ':', v)