fix handling of single value text response #109

FoamyGuy · 2025-07-21T20:33:51Z

setting values = text meant that a string was returned instead of a list.

The code here:

Adafruit_CircuitPython_PortalBase/adafruit_portalbase/__init__.py

Lines 458 to 475 in 3dce5bc

    
           def _fill_text_labels(self, values): 
        
               # fill out all the text blocks 
        
               if self._text: 
        
                   value_index = 0  # In case values and text is not the same 
        
                   for i in range(len(self._text)): 
        
                       if (not self._text[i]["is_data"]) or (value_index > (len(values) - 1)): 
        
                           continue 
        
                       string = None 
        
                       if self._text[i]["transform"]: 
        
                           func = self._text[i]["transform"] 
        
                           string = func(values[value_index]) 
        
                       else: 
        
                           try: 
        
                               string = f"{int(values[value_index]):,d}" 
        
                           except (TypeError, ValueError): 
        
                               string = values[value_index]  # ok it's a string 
        
                       self._fetch_set_text(string, index=i) 
        
                       value_index += 1

Seems to have been written assuming values will be a list. Since string in python behaves sort of like a list this results in it trying to put individual characters from the text into labels on the display. So if the user had only declared 1 text position this would put a label there with just the first letter of the response.

The fix is to add text to the list of values that gets returned, that way a list containing text, [text], is being returned instead of text itself. So the code inside the fill text labels function will then place the entire text response into a single label.

dhalbert

An aside: I am kind of confused by what the second argument to process_text() might actually be. It's a list of regular expressions? A "path" to what, exactly? A file path? I can't find an example of that argument.

FoamyGuy · 2025-07-22T12:20:28Z

@dhalbert I think it means a more general usage of the term path, not something specific like a file path. I believe it's talking about the "path" to take within the data to find the part(s) that we care about. I think it can be used to fetch specific pieces of data out of plain text, or perhaps even basic HTML by specifying appropriate regex to isolate the parts that your interested in for a given project.

The similar process_json() has a json_path, which as I understand it is basically a mapping of which keys and indexes within the JSON to access to find the piece of data that we care about. I think about regexp_path for process_text() essentially the same way, but since text data is less structured than JSON it uses regex instead of simple keys and indexes.

Updating https://github.com/adafruit/Adafruit_CircuitPython_FruitJam to 0.4.0 from 0.3.0: > Merge pull request adafruit/Adafruit_CircuitPython_FruitJam#5 from FoamyGuy/implement_portalbase Updating https://github.com/adafruit/Adafruit_CircuitPython_PortalBase to 3.1.2 from 3.1.1: > Merge pull request adafruit/Adafruit_CircuitPython_PortalBase#109 from FoamyGuy/text_content_fix

fix handling of single value text response

40ab11e

FoamyGuy mentioned this pull request Jul 21, 2025

Adding PortalBase support adafruit/Adafruit_CircuitPython_FruitJam#5

Merged

FoamyGuy requested a review from a team July 21, 2025 20:57

dhalbert approved these changes Jul 22, 2025

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dhalbert merged commit bbae5e4 into adafruit:main Jul 22, 2025
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fix handling of single value text response #109

fix handling of single value text response #109

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FoamyGuy commented Jul 21, 2025 •

edited

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FoamyGuy commented Jul 22, 2025 •

edited

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	def _fill_text_labels(self, values):
	# fill out all the text blocks
	if self._text:
	value_index = 0 # In case values and text is not the same
	for i in range(len(self._text)):
	if (not self._text[i]["is_data"]) or (value_index > (len(values) - 1)):
	continue
	string = None
	if self._text[i]["transform"]:
	func = self._text[i]["transform"]
	string = func(values[value_index])
	else:
	try:
	string = f"{int(values[value_index]):,d}"
	except (TypeError, ValueError):
	string = values[value_index] # ok it's a string
	self._fetch_set_text(string, index=i)
	value_index += 1

fix handling of single value text response #109

fix handling of single value text response #109

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FoamyGuy commented Jul 21, 2025 •

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FoamyGuy commented Jul 22, 2025 •

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