有没有括号差别好大

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#1 Created at ... [Delete] [Delete and Lock User]

在例子这里，如果把fs.append(f)改成fs.append(f())就可以正常输出149了

def count():
    fs = []
    for i in range(1, 4):
        def f():
             return i*i
        fs.append(f)
    return fs

f1, f2, f3 = count()

#2 Created at ... [Delete] [Delete and Lock User]

确实捏，但是直接改成fs.append（f（））的话输出的就是f（）执行后的数了，原本是要输出函数的呀，我是这样认为的

#3 Created at ... [Delete] [Delete and Lock User]

改成这样也可以

def f(i = i):     return i*ifs.append(f)

#4 Created at ... [Delete] [Delete and Lock User]

f相当于一个指向函数的变量，f()才代表调用这个函数