Question

我不明白为什么会收到“无效语法”错误。我做了一个小时的研究没有成功。我正在运行PYTHON 3.此代码中的语法错误在哪里？

  from urllib.request import urlopen
  import json

  request = urlopen("http://api.aerisapi.com/observations/Urbandale,IA?client_id=QD2ToJ2o7MKAX47vrBcsC&client_secret=0968kxX4DWybMkA9GksQREwBlBlC4njZw9jQNqdO")
  response = request.read().decode("utf-8")
  json = json.loads(response)
  if json['success']:
      ob = json['respnose']['ob']
      print ("the current weather in urbandale is %s with a temperature of %d") % (ob['weather'].lower(), ob['tempF']
 else
      print "An error occurred: %s" % (json['error']['description'])
 request().close

Answer 1

有几个原因：

您的括号不平衡：

print ("the current weather in urbandale is %s with a temperature of %d") % (ob['weather'].lower(), ob['tempF']

这是一个关闭的括号，而你所拥有的那个是错误的位置。

这应该是：

print ("the current weather in urbandale is %s with a temperature of %d" % (ob['weather'].lower(), ob['tempF']))

您的else语句缺少:冒号。
你的第二个print函数不是函数，它假装是Python 2语句。通过添加括号来纠正它：
```
print("An error occurred: %s" % (json['error']['description']))
```
您的缩进似乎不正确，但这可能是发布错误。
您的最后一行也无效;您想拨打close()，而不是request()：
```
request.close()
```
使用urllib，您无需关闭对象。
你拼错了respnose：
```
ob = json['response']['ob']
```

工作代码：

from urllib.request import urlopen
import json

request = urlopen("http://api.aerisapi.com/observations/Urbandale,IA?client_id=QD2ToJ2o7MKAX47vrBcsC&client_secret=0968kxX4DWybMkA9GksQREwBlBlC4njZw9jQNqdO")
response = request.read().decode("utf-8")
json = json.loads(response)
if json['success']:
    ob = json['response']['ob']
    print("the current weather in urbandale is %s with a temperature of %d" % (ob['weather'].lower(), ob['tempF']))
else:
    print("An error occurred: %s" % (json['error']['description']))

Answer 2

:之后需要else;

else:
      print "An error occurred: %s" % (json['error']['description'])

此行上(和)的数量不相等：

>>> strs = """print ("the current weather in urbandale is %s with a temperature of %d") % (ob['weather'].lower(), ob['tempF']"""
>>> strs.count('(')
3
>>> strs.count(')')
2

if-else应正确缩进：

if json['success']:
    ob = json['respnose']['ob']
    print ("the current weather in urbandale is %s with a temperature of %d") % (ob['weather'].lower(), ob['tempF'])
else:
    print "An error occurred: %s" % (json['error']['description'])

Answer 3

该行

print ("the current weather in urbandale is %s with a temperature of %d") % (ob['weather'].lower(), ob['tempF']

缺少结束)

应该是

print ("the current weather in urbandale is %s with a temperature of %d" % (ob['weather'].lower(), ob['tempF']))

Python可能会在 next 行

中抱怨它

语法无效的原因未知

3 个答案: