在我的代碼幫助錯誤請python

Question

這裏是我的代碼，它不斷出現相同的錯誤代碼，我不知道爲什麼我得到的錯誤或如何與我的代碼相關的任何信息將幫助！我不是很善於與錯誤的工作

import urllib.request 
import codecs 
import matplotlib.pyplot as pyplot 
import copy 
from time import gmtime, strftime 
from urllib.request import urlopen 
def readInfo(filename): 
    myFile = open(filename,'r') 
    data=myFile.readlines() 
    namelist=[i.split(' ', 1)[0] for i in data] 
    balance = list() 
    for item in data: 
     name = item.split()[0] 
     amount = float(item.split()[1]) 
     balance.append([name, amount]) 
    print("n",namelist,"c",balance) 

    return (namelist, balance) 
def fetch(url): 
    def find_element(line, s_pattern, e_pattern, position=0): 
     shift = len(s_pattern) 
     start = line.find(s_pattern, position) + shift 
     position = start 
     end = line.find(e_pattern, position) 
     return (line[start:end], position) 
    html = urlopen(url) 
    records = [] 
    i = 0 
    for line in html.readlines(): 
     line = line.decode() 
     if "<tr><td>" not in line: 
      continue # skip if line don't contain rows 
     if "Currency" in line: 
      continue # skip header 

     start = "<tr><td>" 
     end = "</td>" 
     element, start_pos = find_element(line, start, end) 
     records.append([element]) 
     start = "<td>" 
     values = [] 
     for x in range(2): 
      element, start_pos = find_element(line, start, end, start_pos) 
      values.append(element) 
     records[i].append(values) 
     i = i + 1 
    print(records) 
    return(records) 

def findCurrencyValue(records, currency_name): 
    d = dict(records) 
    print(d[currency_name]) 
    return(d[currency_name]) 

def transaction(filename, namelist, orgBalance, url): 
    exchange_info= fetch(url) 
    #Read each line from transactions.txt 
    myFile = open(filename,'r') 
    data=myFile.readlines() 
    #Check which company is conducting transactions 
    bank = dict(orgBalance) 
    for line in data: 
     company,action,currency,ammount = line.split() 
     do_something(company,action,currency,ammount,bank) 
    #If BUY, then convert the amount of foreign currency to USD 
    #and subtract the calculated amount 
    def find_currency_rate(currency): 
    # locate the curency name in the text body and find the last <td></td> value in that row... 
     return float(last_td_cell_of_row) 

    def convert_to_usd(currency,amount): 
     currency_rate = find_currency_rate(currency) 
     return amount*currency_rate 

    def do_something(company_name,action,currency_code,amount,bank): 
     amount_in_usd = convert_to_usd(currency_code,amount) 
     if action == "BUY": 
      bank[company_name] = bank[company_name] - amount_in_usd 
     else: # else we sell and add the funds to our bank 
      bank[company_name] = bank[company_name] + amount_in_usd 
def main(): 
    #get the namelist and original balance for all companies 
    filename1 = "balance.txt" 
    namelist, orgBalance = readInfo(filename1) 
    #specifies the URL 
    url = "https://www.cs.purdue.edu/homes/jind/exchangerate.html" 
    #calculate the current balance for all companies 
    balance = copy.deepcopy(orgBalance) 
    filename2 = "transactions.txt" 
    curBalance = transaction(filename2, namelist, balance, url) 
    #output the value for the original balance for each company 
    #this output should be a list of lists 
    print("Original Balance of each company is: ", orgBalance) 
    #output the value for the current balance for each company 
    #this output should be a list of lists 
    print("Current Balance of each company is: ", curBalance) 
    #call your bar graph plotting function 
    plotBarGraph(orgBalance, curBalance) 
    #call your pie graph plotting function 
    plotPieChart(curBalance)  
main() 

當我運行的代碼，我碰到下面的錯誤，我需要幫助固定

Traceback (most recent call last): 
    File "C:\Users\noahd\Desktop\project3\project3-skeleton.py", line 134, in <module> 
    main() 
    File "C:\Users\noahd\Desktop\project3\project3-skeleton.py", line 123, in main 
    curBalance = transaction(filename2, namelist, balance, url) 
    File "C:\Users\noahd\Desktop\project3\project3-skeleton.py", line 63, in  transaction 
    company,action,currency,ammount = line.split() 
ValueError: too many values to unpack (expected 4) 

Answer 1

看來，當你執行line.split（） ，它會返回比需要更多的元素，應該只有4個：公司，操作，貨幣，ammount。 不過，你可以嘗試：

try: 
    company,action,currency,ammount = line.split() 
except: 
    print "DEBUG: split:",line.split() 

，並檢查其中的錯誤

Answer 2

嘗試：

transaction,company,action,currency,ammount,_ = line.split()