Question

对股票数据进行Alpha Vantage API拉动。在下面的代码中，api pull中包含三个变量：fastperiod，slowperiod和matype。我试图找出一种反复运行此功能的方法，每次这三个变量在下一次拉动时都会更改。 matype可以是0到8之间的整数。快周期和慢周期可以是1到100之间的整数。因此，从理论上讲，这件事会一遍又一遍，每次更改这些变量，直到用完这三个变量的所有可能变化。

有什么建议吗？

def get_ppo_close_8():
    pull_parameters = {
        'function': 'PPO',
        'symbol': stock,
        'interval': interval,
        'series_type': 'close',
        'fastperiod': 12,
        'slowperiod': 26,
        'matype': 8,
        'datatype': 'json',
        'apikey': key
    }
    pull = rq.get(url, params=pull_parameters)
    data = pull.json()
    df = pd.DataFrame.from_dict(data['Technical Analysis: PPO'], orient='index', dtype=float)
    df.reset_index(level=0, inplace=True)
    df.columns = ['Date', 'PPO Close 8']
    df.insert(0, 'Stock', stock)
    return df.tail(past_years * annual_trading_days)

Answer 1

要加快进度，您可以使用itertools.product()。对于您的特定情况，它看起来像：

    from itertools import product

    def get_ppo_close_8(matype, slowperiod, fastperiod):
        # Replace the print with your code here
        print(">>>", matype, slowperiod, fastperiod)

    # define your ranges
    matype = range(8)
    slowperiod = range(100)
    fastperiod = range(100)

    # product will make a generator that will produce all triplets
    combinations = product(matype, slowperiod, fastperiod)

    # efficiently use them in your function
    for item in combinations:
        get_ppo_close_8(*item)  # use '*' to unpack

Answer 2

方法1：易于理解

使用嵌套的for循环迭代输入变量的所有组合。我还修改了范围，假设您实际上想要从1开始的值

for matype in range(1,9):
    for slowperiod in range(1,101):
        for fastperiod in range(1,101):
            get_ppo_close_8(matype, slowperiod, fastperiod)

方法2：itertools（来自https://stackoverflow.com/a/57245884/9510611以下的sal）

matype = range(1,9) 
slowperiod = range(1,101) 
fastperiod = range(1,101)

# product will make a generator that will produce all triplets 
combinations = product(matype, slowperiod, fastperiod) 

# efficiently use them in your function 
for matype, slowperiod, fastperiod in combinations: 
    get_ppo_close_8(matype, slowperiod, fastperiod)

每次运行函数时如何增加函数变量

2 个答案: