标签：表示 ict pen for span 大神 gen 16px false
1、求结果
v=dict.fromkeys([‘k1‘,‘k2‘],[])
v[‘k1‘].append(666)
print(v)
v[‘k1‘] = 777
print(v)
v=dict.fromkeys([‘k1‘,‘k2‘],[]) v[‘k1‘].append(666) print(v) #{‘k2‘: [666], ‘k1‘: [666]} v[‘k1‘] = 777 print(v) #{‘k2‘: [666], ‘k1‘: 777}
2、求结果
def num():
return [lambda x:i*x for i in range(4)]
print(m(2) for m in num())
def num(): return [lambda x:i*x for i in range(4)] print(m(2) for m in num())# <generator object <genexpr> at 0x0000000000B2FA40> 为元祖 print(list(m(2) for m in num())) # [6, 6, 6, 6]
3、求结果
a、[i%2 for i in range(10)]
b、( i % 2 for i in range(10) )
a=[i%2 for i in range(10) ] print(a) # 因为 [] 为列表 所以会有结果为[0, 1, 0, 1, 0, 1, 0, 1, 0, 1] b=(i%2 for i in range(10)) print(b) # 因为（）为元祖 所以会有结果为 <generator object <genexpr> at 0x0000000000645D00> c=list(b) # 将元祖转换格式为列表 print(c) # 打印c，结果为 [0, 1, 0, 1, 0, 1, 0, 1, 0, 1]
4、求结果：?
a. 1 or 2?
b. 1 and 2?
c. 1 < (2==2)?
d. 1 < 2 == 2
print(1 or 2) # 1 print(1 and 2) # 2 print(1<(2==2)) # False 因为2==2为True,而True表示为1，False表示为0，所以1<1，结果为False print(1<2==2) # True 但是值为什么是True？大神看到请解释一下，谢谢！
标签：表示 ict pen for span 大神 gen 16px false
原文地址：https://www.cnblogs.com/zhuifeng-mayi/p/9184504.html
