age = 45
if age>=0 and age<22:
print(“学生未毕业”)
else:
print(“学生已毕业”)
x = 5
y = (x > 3 or x < 4)
print(y)
a = “orange”
if “o” in a:
print(“orange”)
else:
print(" ")
dict_data = {“张三”: 21, “李四”: 20, “王五”: 19, “赵六”: 18, “刘七”: 19, “张麻子”: 20, “耿耿”: 20, “余淮”: 19}
python_count = 0
c_count = 0
java_count = 0
go_count = 0
for i in dict_data.values():
if i == 21:
python_count += 1
if i == 20:
c_count += 1
if i == 19:
java_count += 1
if i == 18:
go_count += 1
print(“Learn Python Students:”, python_count)
print(“Learn C Students:”,c_count)
print(“Learn Java Students:”,java_count)
print(“Leave Go Students,”,go_count)
dict_data = {1: 2,3: 4}
for i in dict_data.keys():
print(i)
for i in dict_data.values():
print(i)
for i in dict_data.items():
print(i)
tuple_data = (1, 2, 3)
for i in enumerate(tuple_data):
print(i)
