x = 10
res = ‘ok‘ if x > 3 else ‘no‘
print(res)
#列表解析
l = [‘egg%s‘%i for i in range(10)]
print(l)
l = [‘egg%s‘%i for i in range(10) if i > 5]
print(l)
names = [‘alex_sb‘,‘egon‘,‘wupeiqi_sb‘,‘yuanhao_sb‘]
names_new = [name for name in names if name.endswith(‘sb‘)]
print(names_new)
#生成器表達式
g = (‘egg%s‘%i for i in range(10))##將中括號變成小括號即為生成器表達式
#叠代器同一時間在內存中只有一個值
print(g)
print(next(g))
print(next(g))
with open(‘db.txt‘,encoding = ‘utf-8‘) as f:
    g = (len(line) for line in f)
    print(max(g))

Python__三元表達式+列表解析+生成器表達式