类型错误：参数1必须有一个“写”的方法 - 从字典

Question

我试图创建一个从字典一个CSV创建CSV文件，但我收到的错误：

in create_csv 
    writer = csv.writer('userInfo.csv') 
TypeError: argument 1 must have a "write" method 

代码：

#Create dict file to test 
userInfoDict = {'orgID': '17', 'firstName': 'TestFirstName', 'lastName': 'TesLastName', 
       'emailAddress': 'test@test.com', 'phoneNumber': '123-456-7890', 
       'isoCountryCode': 'US'} 

def create_csv(userInfoDict): 
    import csv 

    userInfo = open('userInfo.csv', 'wb') 

    for key in userInfoDict: 
     if len(userInfoDict['orgID']) == 0: 
      print('Not a valid user: No orgID') 
      return None 
     elif len(userInfoDict['firstName']) == 0: 
      print('Not a valid user: No First Name') 
      return None 
     elif len(userInfoDict['emailAddress']) == 0 or len(userInfoDict['phoneNumber']) == 0: 
      print('Not a valid user: No Email or Phone') 
      return None 
     else: 
      writer = csv.writer(userInfo, delimiter=',') 
      for key, value in userInfoDict.items(): 
       writer.writerow([key], [value]) 
     return 

create_csv(userInfoDict) 

Answer 1

你应该通过你的文件，但没有文件名的作家：

with open('userInfo.csv', 'wb') as userInfoCsv: 
    writer = csv.writer(userInfoCsv) 

你不应该有'。'符号在你的变量的名称，所以你的变量应该是userInfoCsv或user_info_csv

userInfo = open('userInfo.csv', 'wb')为什么你用这条线？你打开以后使用with open('userInfo.csv', 'wb')

你的文件，你可以看到一个方法csv.DictWriter

with open('userInfo.csv', 'wb') as user_info_csv: 
    writer = csv.DictWriter(user_info_csv, fieldnames=['your', 'column', 'names'], delimiter=';') 
    writer.writerow(userInfoDict) 

UPDATE 全功能与评论

def create_csv(userInfoDict): 
    import csv 

    with open('userInfo.csv', 'wb') as userInfo: 

     for key in userInfoDict: 
      if len(userInfoDict['orgID']) == 0: 
       print('Not a valid user: No orgID') 
       return None 
      elif len(userInfoDict['firstName']) == 0: 
       print('Not a valid user: No First Name') 
       return None 
      elif len(userInfoDict['emailAddress']) == 0 or len(userInfoDict['phoneNumber']) == 0: 
       print('Not a valid user: No Email or Phone') 
       return None 
      else: 
       writer = csv.DictWriter(userInfo, fieldnames=userInfoDict.keys(), delimiter=';') 
       # writer.writeheader() # If you want to add header 
       writer.writerow(userInfoDict)