Binance create_market_sell_order: Illegal characters found in parameter 'quantity'

Here is a simple example of this problem. a is created as a Binance exchange object and the markets are already fetched. However,

>>> a.create_market_sell_order('BTC/USDT', 0.000096)
Traceback (most recent call last):
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/base/exchange.py", line 346, in fetch
    response.raise_for_status()
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/requests/models.py", line 935, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: https://api.binance.com/api/v3/order

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/base/exchange.py", line 1010, in create_market_sell_order
    return self.create_order(symbol, 'market', 'sell', amount, None, params)
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/binance.py", line 545, in create_order
    response = self.privatePostOrder(self.extend(order, params))
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/base/exchange.py", line 296, in request
    return self.fetch2(path, api, method, params, headers, body)
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/base/exchange.py", line 293, in fetch2
    return self.fetch(request['url'], request['method'], request['headers'], request['body'])
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/base/exchange.py", line 358, in fetch
    self.handle_errors(response.status_code, response.reason, url, method, None, self.last_http_response)
  File "/Users/Allen_Frostline/anaconda3/lib/python3.6/site-packages/ccxt/binance.py", line 707, in handle_errors
    raise ExchangeError(self.id + ' ' + self.json(response))
ccxt.base.errors.ExchangeError: binance {"code":-1100,"msg":"Illegal characters found in parameter 'quantity'; legal range is '^([0-9]{1,20})(\\.[0-9]{1,20})?$'."}
>>> 

Can anybody explain or solve this?

[dexhunter]

@akaniklaus You can use '{:.8f}'.format(float(1e-8)) to get 0.00000001

[ghost]

this error also appears if since= is a float, ensure its an int() or use exchange.milliseconds(). fin.