JSONDecode Error: Expected value: Line 1 Column 1 (char 0) Executing Python code, you are trying to decode invalid JSON.
This error can occur in three instances.
Case 1: Invalid JSON content decoded Case 2: Empty or invalid .json file uploaded Case 3: Your request did not return valid JSON.
The following articles describe how to resolve this error in each case.
1. Invalid JSON content decoding.
When you call the load() or load() function on a Python json library, you should return valid JSON content.
Let’s say you pass a string like this to the load() function:
data = ‘{“name”: Nathan}’.
res = json.load(data);
Because the load() function requires a valid JSON string, the above code produces this error:
Trace (Last Call): 1.1.
file…
res = json.load(data);
json.decoder.JSONDecodeError: Expected value: line 1 column 1 (char 0).
To fix this error, you need to make sure that the JSON string that you pass to the load() function is valid.
To check if your data is a valid JSON string you can try skipping the subsections:
data = ‘{“name”: Nathan}’.
try:
res = json.load(data);
print(“The data is a valid JSON string”)
Error Exception: 1.1.
print(“The data is not a valid JSON string”);
You can tell when a JSON string is invalid when trying to skip parts.
However, the load() function needs to know why an invalid JSON string is being passed.
Most likely your JSON string is a typo as above.
Note that Nathan’s prices do not include double bids:
data = ‘{“Name”: Nathan}’ # ❌ False
data = ‘{“Name”: “Nathan”}’ # ✅ True
If you see this in your code, you have to modify the data to comply with the JSON standard.
2. You uploaded an empty or invalid JSON file.
Another instance where this error can occur is when loading an empty .json file.
Let’s say you are trying to load a data.json file with the following code.
open (“data.json”, “r”) is the file:
data = json.loads(file.read())
If the data.json file is empty, Python responds with an error:
Trace (Last Call): 1.1.
file…
data = json.loads(file.read())
json.decoder.JSONDecodeError: Expected value: line 1 column 1 (char 0).
The same error will occur if your file contains invalid JSON content. For example:
To avoid this error, you need to make sure that the .json file you are uploading is not empty and contains valid JSON content.
To catch this error you can try to override the block in this context:
try:
open (“data.json”, “r”) is the file:
data = json.loads(file.read())
print (“File contains valid JSON content”)
Error Exception: 1.1.
print(“File is empty or contains invalid JSON”)
If you want to check the original file, you can use jsonlint.com .
3. Your request did not return a valid JSON.
When sending an HTTP request using the request library to extract the JSON content, you can use the .json() method of the Response object:
Import request
response = request.receive(‘https://api.github.com’)
data = jsonResponse().
Printing (data)
However, if the response object does not have a valid JSON encoding, a JSONDecodeError is raised:
Trace (Last Call): 1.1.
…
Another exception occurred in the above exception handling.
Trace (Last Call): 1.1.
file…
data = jsonResponse().
Request.exceptions.JSONDecodeError:
Expected value: line 7 column 1 (char 6);
As you can see the request object has a JSONDecodeError: expected text-value, line 7, column 1 .
To fix this error you need to try blocking the following calls to response.json().
Import request
response = request.receive(‘https://api.github.com’)
try:
data = jsonResponse().
Printing (data)
Excluded are:
print(“Error from server:” + str(response.content))
When an exception condition applies, you will receive the contents of a response written in string format.
You should review the printout for more information on why a JSON-formatted response is not valid.
Conclusion
In this article, we’ll look at how to fix it. JSONDecodeError: Error on expected value when using Python
This error can occur in 3 cases: when decoding invalid JSON content, when loading an empty or invalid .json file, making an HTTP request that does not return valid JSON: Line 1 Column 1 (星 0) is invalid when Python tries to execute the code JSON string code Decompile it.
This error can occur in three instances.
Case 1 :Decoding invalid JSON content
Case 2: Empty or invalid .json file
It must be done
The oad() function is passed a string like this.
data = ‘{“of”:Nathan}’.
res = json.loads(data);
No