Python错误，IndentationError：意外缩进

Question

每次我尝试执行这个脚本，我得到一个错误。 代码：

def getURL(): # Get tokens 
    output = subprocess.Popen(["livestreamer", "twitch.tv/CHANNEL_NAME", "-j"], stdout=subprocess.PIPE).communicate()[0] 
    return json.loads(output)['streams']['worst']['url'] # Parse json and return the URL parameter 

def build(): # Builds a set of tokens, aka viewers 
    global numberOfSockets 
    global numberOfViewers 
    while True: 
     if numberOfSockets < numberOfViewers: 
      numberOfSockets += 1 
      print "Building viewers " + str(numberOfSockets) + "/" + str(numberOfViewers) 
      urls.append(getURL()) 

错误：

File "sript.py", line 19 
    return json.loads(output)['streams']['worst']['url'] # Parse json and return the URL parameter 
    ^
IndentationError: unexpected indent 

Answer 1

缩进的getURL第二线，使其线与返回语句：

def getURL(): # Get tokens 
    output = subprocess.Popen(["livestreamer", "twitch.tv/CHANNEL_NAME", "-j"], stdout=subprocess.PIPE).communicate()[0] 
    return json.loads(output)['streams']['worst']['url'] 

记住了Python需要缩进严重，因为它使用它来确定什么与什么。