TypeError: cannot concatenate 'str' and 'dict' objects

问题:

I am a novice in the field, and I wanted to create a program that was useful and fast handling, and run this script, I get this error, and I could not get this error.

# -*- coding: cp1252 -*- import ftplib, os from ftplib import FTP   def getFTPConfig(FTPLib):     if os.path.exists("./incluide/Config.json"):         with open("./incluide/Config.json") as ConfigFTP:             FTPConnect = ConfigFTP.read()     else:         os.system("title Config FTPConnect")         Host = raw_input("Enter the host: ")         Login = raw_input("Enter the login: ")         Pass = raw_input("Enter de password: ")         file = open("./incluide/Config.json", "wb")         file.write('''{"Host": "'''+Host+'''",  "Login: "'''+Login+'''",  "Pass: "'''+Pass+'''"}''')         file.close()         print "Successfully created"         os.system("FTP Session")     try:         FTPs = json.loads(FTPConnect)         return FTPs[FTPLib]     except:         return {}      with open("./incluide/Config.json") as ConfigFTP:         FTPConnect = ConfigFTP.read()         print('Conectando ao Servidor FTP... Espere um momento...')          FTPConnect = FTP(Host, Login, Pass)          File = "Session.py" #Arquivo a ser enviado          file = open('%s' %(File),'rb')         print('Conectado.')          print('Enviando arquivo... Espere um momento...')          session.storbinary('STOR %s' %(File), file)          print('Arquivo enviado!')          file.close()         session.quit()  if __name__ == "__main__":     Title = "ERROR CONNECTING TO FTP"     os.system('cls');os.system('title '+Title)     FTPError = """                """+Title+"""                Check the connection:                Host: """+getFTPConfig('Host')+"""                Login: """+getFTPConfig('Login')+"""                Pass: """+getFTPConfig('Pass')+""""""     print (FTPError).center(80)     time.sleep(5) 

It sends this error

Traceback (most recent call last):   File "C:\Users\Desktop\FTP\Session.py", line 59, in <module>     Pass: """+getFTPConfig('Pass')+"""""" TypeError: cannot concatenate 'str' and 'dict' objects 

回答1:

the error message should be clear, you can't use + operator to sum a string and a dictionary, maybe you want to convert the dict to a string. If getFTPConfig('Pass') is returning a dictionary then

str(getFTPConfig('Pass'))+"whatever" 

回答2:

web_response = {2L: 67.0, 3L: 13.67, 4L: 10.25, 5L: 11.8, 6L: 11.83} 

I've a dictionary named "web_response",For concatenation of dictionary with string I used comma ","

print "web_response=", web_response 

Output:

web_response= {2L: 67.0, 3L: 13.67, 4L: 10.25, 5L: 11.8, 6L: 11.83} 

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