Beginning Python Programming
Makzan, 2020 April.
L = range(1,10)
for x in L:
print(x*x)L = range(1,10)
L2 = []
for x in L:
L2.append( x*x )
print(L2)L2 = [x*x for x in range(1,10)]
print(L2)L2 = [x*x for x in range(1,10)]L2 = []
for x in range(1,10):
L2.append( x*x )
print(L2)1. Construct a new list
2. The list source is an iteration
3. Each new element is calculated from the source element.
4. Result list
scores = [34, 65, 45, 67, 78, 56, 80]
passed_scores = [x for x in scores if x >= 60]
print(passed_scores)
# Result:
# [65, 67, 78, 80]scores = [34, 65, 45, 67, 78, 56, 80]
L = [x for x in scores if x >= 60]L = []
for x in scores:
if x >= 60:
L.append(x)
1. Construct a new list
2. The list source is an iteration
4. Each new element is calculated from the source element.
5. Result list
3. Add to the list according to condition
scores = [34, 65, 45, 67, 78, 56, 80]
L = [x for x in scores if x >= 60]