FrappeClient eats too many useful errors

[peerDE]

When using FrappeClient for inserting objects, too many useful errors are suppressed.
This can lead to hours-long head-scratching and thus quick baldness, which calls into question the sustainability of its use during cold weather.

The reason is in the post_process method https://github.com/frappe/frappe-client/blame/aad36de5eb27be1bc6a8357791ee26ecb7cecd99/frappeclient/frappeclient.py#L277-L291 which replaces the useful error message with just:
None

A proper way to output errors would yield a more informative result similar to this:

<Response [417]>
EXPECTATION FAILED
{"exc_type":"MandatoryError","_server_messages":"[\"{\\\"message\\\": \\\"Fehler: Wert fehlt f\\\\u00fcr None: parent\\\", \\\"title\\\": \\\"Nachricht\\\"}\", \"{\\\"message\\\": \\\"Fehler: Wert fehlt f\\\\u00fcr None: parenttype\\\", \\\"title\\\": \\\"Nachricht\\\"}\"]"}

Please note that a suppressed "Expectation failed" can be quite a hurdle for new devs, but might throw off path for a while even seasoned ones, in other words, it's a hassle for most everyone. That might be the reason why the post_process method visibly goes to some lenght (see linked-above code) to display what might be useful to help.

But instead of providing code along the lines of:

if rjson and ('exc_type' in rjson) and rjson['exc_type']:
    raise FrappeException(rjson['exc_type'])

and/or:

if rjson and ('_server_messages' in rjson) and rjson['_server_messages']:
    raise FrappeException(rjson['_server_messages'])

the otherwise properly JSON formatted error as shown above slips through all the catch-useful-error code and just vanishes like my scratched head's hair. There might be other vanishing useful errors having produced more baldness world-wide.

My debugging workaround looks like this (run it after importing FrappeClient):

### DEBUG
# Overload insert method of FrappeClient with this in order to see more errors which otherwise would just be eaten by default by "return None" in FrappeClient's method "post_process":
def MYinsert(self, doc):
    # The following 2 lines are local imports needed to make the overload work without influencing the surrounding CuT (Code under Test)
    from urllib.parse import quote
    import json
    '''Insert a document to the remote server
        :param doc: A dict or Document object to be inserted remotely'''
    res = self.session.post(self.url + "/api/resource/" + quote(doc.get("doctype")),
        data={"data":json.dumps(doc)})
    # The following 3 lines are my custom Error-Not-Eater:
    print(res)
    print(res.reason)
    print(res.text)
    return self.post_process(res)

FrappeClient.insert = MYinsert

and allowed me at least to actually get the suppressed errors which FrappeFramework so usefully supplies and which I needed to now very quickly debug the import scripts I am working on.

Thank you for your attention to this matter, ;-)
and enjoy the workaround as long as this issue is not fixed otherwise.