{"record":{"id":"6576a01c189c757f","repo":"TheAlgorithms/Python","slug":"color-is-not-a-valid-color-for-temperature-coeff","errorCode":null,"errorMessage":"{color} is not a valid color for temperature coeffecient band","messagePattern":"(.+?) is not a valid color for temperature coeffecient band","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"electronics/resistor_color_code.py","lineNumber":217,"sourceCode":"\n\ndef get_temperature_coeffecient(color: str) -> int:\n    \"\"\"\n    Function returns the temperature coeffecient value associated with the color.\n    Function takes color as input and returns temperature coeffecient value.\n\n    >>> get_temperature_coeffecient('Yellow')\n    25\n\n    >>> get_temperature_coeffecient('Cyan')\n    Traceback (most recent call last):\n      ...\n    ValueError: Cyan is not a valid color for temperature coeffecient band\n\n    \"\"\"\n    if color not in temperature_coeffecient_color_values:\n        msg = f\"{color} is not a valid color for temperature coeffecient band\"\n        raise ValueError(msg)\n    return temperature_coeffecient_color_values[color]\n\n\ndef get_band_type_count(total_number_of_bands: int, type_of_band: str) -> int:\n    \"\"\"\n    Function returns the number of bands of a given type in a resistor with n bands\n    Function takes total_number_of_bands and type_of_band as input and returns\n    number of bands belonging to that type in the given resistor\n\n    >>> get_band_type_count(3,'significant')\n    2\n\n    >>> get_band_type_count(2,'significant')\n    Traceback (most recent call last):\n      ...\n    ValueError: 2 is not a valid number of bands\n\n    >>> get_band_type_count(3,'sign')","sourceCodeStart":199,"sourceCodeEnd":235,"githubUrl":"https://github.com/TheAlgorithms/Python/blob/f5988cc09713315817df6a7e327e258013a94440/electronics/resistor_color_code.py#L199-L235","documentation":"Thrown by get_temperature_coeffecicient() in electronics/resistor_color_code.py when color is not a key of temperature_coeffecient_color_values. The temperature-coefficient (6th) band has its own small color set (e.g. Brown 100, Red 50, Orange 15, Yellow 25, Blue 10, Violet 5 per the library table); colors from other band types (Cyan, Green-as-tolerance) are rejected.","triggerScenarios":"get_temperature_coeffecient('Cyan'); passing a 4/5-band resistor color into the 6-band function; using a color whose name casing differs from the table key.","commonSituations":"Decoding a 6-band resistor but reading the wrong physical band; assuming all colors are valid for every band type; copy-pasting color lists between get_tolerance and get_temperature_coeffecicient calls.","solutions":["Use a temp-coeff color from the table: get_temperature_coeffecient('Yellow') -> 25.","Verify the resistor actually has 6 bands before calling (see get_band_type_count).","Check band order against the library's documented layout and normalize color-name casing."],"exampleFix":"# before\nget_temperature_coeffecient('Cyan')  # ValueError\n\n# after\nget_temperature_coeffecient('Yellow')  # 25","handlingStrategy":"type-guard","validationCode":"if color not in temperature_coeffecient_color_values:\n    raise ValueError(f'{color!r} is not a temp-coefficient color')","typeGuard":"def is_temp_coeff_color(color: str) -> bool:\n    return color in temperature_coeffecient_color_values","tryCatchPattern":"try:\n    tc = get_temperature_coeffecient(color)\nexcept ValueError as exc:\n    # only 6-band resistors have this band; verify count first\n    ...","preventionTips":["Check the resistor has 6 bands before decoding temp-coeff.","Validate against the temp-coeff color table before calling.","Keep band order straight: temp-coeff is the last band on 6-band parts."],"tags":["electronics","resistor","color-code","temperature-coefficient","valueerror"],"backgroundTag":null,"analyzedSha":"f5988cc09713315817df6a7e327e258013a94440","analyzedAt":"2026-08-14T17:30:07.041Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}