Question

我对python很新，需要一些指导。我试图从控制台传递一些变量并获取错误消息：

AuctionStrategy_2.0.py: error: argument -s/--sectorStocks: invalid int value: 'tep3'

当我运行控制台命令时：

 run AuctionStrategy_2.0.py -in10 -out5 -rolls15 -step3 -t.001 -s5 -m100 -v50 -e'01/01/2016'

有人能告诉我如何解决这个问题吗？我的代码除了尝试从控制台传递变量之外什么都不做。请参阅下面的代码：

import argparse
import os
import fnmatch
import pandas as pd 
from pandas.tseries.offsets import BDay
import lzma
import numpy as np
import math
import datetime

def main():
    print('Processing args....')   

    insampleLength,outsampleLength,rolls,step,threshold,minStocksPerSector,minMarketCap,minVolume,endDate = get_args()
    print(insampleLength,outsampleLength,rolls,step,threshold,minStocksPerSector,minMarketCap,minVolume,endDate)
    rawDataPath = 'C:/Users/simon/Documents/data/close_unadjusted/close_unadjusted/'

def get_args():

    '''This function parses and return arguments passed in'''

    insampleLength = 0
    outsampleLength = 0
    rolls = 0
    step = 0
    endDate =''
    minStocksPerSector = 0
    threshold = 0


    parser = argparse.ArgumentParser(
        description='Args to run VWAP Auction simulation')

    ''' Command line arguments'''

    parser.add_argument('-in', '--inSampleDataLength', type=int, help='Number of historic epochs insample', required=True)
    parser.add_argument('-out', '--outSampleDataLength', type=int, help='Number of historic epochs outsample', required=True)
    parser.add_argument('-rolls', '--numberRolls', type=int, help='Number of rolls', required=True)
    parser.add_argument('-step', '--rollStep', type=int, help='Number of historic epochs', required=True)

    parser.add_argument('-t','--threshold', type=float, help='starting value', required=True)    
    parser.add_argument('-s','--sectorStocks', type=int, help='minimum number', required=True)
    parser.add_argument('-m','--marketCapCutOff', type=int,help='market capitalisation', required=True)
    parser.add_argument('-v','--volumeCutOff', type=int, help='daily volume', required = True)
    parser.add_argument('-e', '--endDate', type=str,help='last day of testing',required = True)


    args = parser.parse_args()

    ''' Assign args to variables'''

    insampleLength = args.inSampleDataLength
    outsampleLength = args.outSampleDataLength
    rolls = args.numberRolls
    step = args.rollStep
    threshold = args.threshold
    minStocksPerSector = args.sectorStocks
    minMarketCap = args.marketCapCutOff
    minVolume = args.volumeCutOff
    endDate = datetime.datetime.strptime(args.endDate, "%d-%b-%Y")


    return insampleLength,outsampleLength,rolls,step,threshold,minStocksPerSector,minMarketCap,minVolume,endDate


if __name__ == "__main__":  
    print ("AuctionStategy_1.0...25/03/16")

    try:
        main()              
    except KeyboardInterrupt:
        print ("Ctrl+C pressed. Stopping...")

Answer 1

单个破折号始终标识单个字符参数。但是你试图定义def main(): infile = open("WTExcerpt.xml", "r", encoding="utf8") outfile = open("DemoWT.html", "w") print("<html>\n<head>\n<title>Winter's Tale</title>\n",file=outfile) print("<link rel='stylesheet' type='text/css' href='Shakespeare.css'>\n</head>\n<body>\n",file=outfile) for line in infile: text = line.replace("<w>", "") if "<title>" in text and "</title>" in text: print("<h1>",text,"</h1>\n",file=outfile) elif text=="<head>": in_headline = True headline = "" elif text == "</head>": in_headline = False print("<h3>", headline, "</h3>\n", file=outfile) elif in_headline: headline += text main();这被解释为-step，稍后由实际的-s参数重新定义。

您应该为“步骤”选择不同的标识符，或者始终使用双破折号版本-s。

Answer 2

参数-s需要一个整数，你给了一个字符串，这会导致你得到的错误。

顺便说一句，我认为在参数的名称和它的值之间添加空格更好，例如：

run AuctionStrategy_2.0.py -in 10 -out 5 -rolls 15 -step 3 -t .001 -s 5 -m 100 -v 50 -e '01/01/2016'

希望这有帮助

从控制台错误中解析变量

2 个答案: