Error: KeyError – ‘video_fps’
A KeyError with the message ‘video_fps’ indicates that the key ‘video_fps’ is not found in a dictionary or a similar data structure. This error occurs when you try to access a value using a key that does not exist in the structure. Here is an explanation of the error and an example to illustrate it.
Explanation:
In Python, dictionaries are data structures that store key-value pairs. Each key in a dictionary must be unique. When you try to access a value using a key that is not present in the dictionary, a KeyError will be raised.
In the case of the ‘video_fps’ key, it means that you are trying to access the value associated with this key, but it is not present in the dictionary. This could be due to a typo in the key, or the key not being added to the dictionary at all.
Example:
# Create a dictionary
video_info = {'video_resolution': '1080p', 'video_duration': '2h 30m'}
# Try to access the value of 'video_fps'
fps = video_info['video_fps'] # KeyError: 'video_fps'
In the given example, we have a dictionary ‘video_info’ that contains information about a video. However, the key ‘video_fps’ is not present in the dictionary. When we try to access the value of ‘video_fps’ using video_info[‘video_fps’], a KeyError is raised since the key does not exist.
Solution:
To resolve this error, you can perform the following steps:
- Ensure that the key you are trying to access is spelled correctly and matches the case sensitivity of the keys in the dictionary.
- Check if the key is present in the dictionary before accessing its value. You can use the ‘in’ operator or the get() method to safely access the value. For example:
# Using 'in' operator
if 'video_fps' in video_info:
fps = video_info['video_fps']
else:
fps = None
# Using get() method
fps = video_info.get('video_fps') # fps will be None if 'video_fps' key does not exist
By checking if the key exists in the dictionary, you can handle the case where the key is not found and avoid the KeyError.