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这是我的代码，它不断出现相同的错误代码，而且我不确定为什么我会收到该错误或它与我的代码的关系如何，任何信息都将帮助您!我只是不太善于处理错误
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()
当我运行代码时，出现以下错误，需要帮助修复
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)