Python对函数参数和操作数的求值顺序是确定的吗（+它记录在哪里）？

Question

C不是guarantee any evaluation order，所以像f(g1()+g2(), g3(), g4())这样的语句可以按任何顺序执行g1()、g2()、g3()、和{}（尽管f()将在它们之后执行）

那么Python呢？我对Python2.7的实验表明，它似乎是从左到右的求值顺序，但我想知道是否指定了这种情况。

测试程序：

def somefunc(prolog, epilog):
    print prolog
    def f(a, b, *args):
        print epilog
    return f        

def f(text):
    print text
    return 1

somefunc('f1','f2')(f('hey'),f('ho'),f('hahaha'),f('tweedledee')+f('tweedledum'))

哪个指纹

^{pr2}$

Answer 1

https://docs.python.org/3/reference/expressions.html#evaluation-order：

Python evaluates expressions from left to right. Notice that while evaluating an assignment, the right-hand side is evaluated before the left-hand side.

In the following lines, expressions will be evaluated in the arithmetic order of their suffixes:

expr1, expr2, expr3, expr4
(expr1, expr2, expr3, expr4)
{expr1: expr2, expr3: expr4}
expr1 + expr2 * (expr3 - expr4)
expr1(expr2, expr3, *expr4, **expr5)
expr3, expr4 = expr1, expr2

The same is true in Python 2.