python type_error ai_generated true

TypeError: 'bins' must be an integer, a sequence of scalars, or a string, not <class 'list'> of strings.

ID: python/matplotlib-histogram-bins-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-05-25First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.8 active — — —
3.9 active — — —

Root Cause

Passing a list of strings as bins to plt.hist(), which expects numeric bins or a single string method (like 'auto', 'fd').

generic

中文

向plt.hist()传递了字符串列表作为bins参数，但该参数需要数值型bins或单个字符串方法（如'auto'、'fd'）。

Workarounds

  1. 95% success Use an integer for the number of bins 
    plt.hist(data, bins=20)
  2. 90% success Use a sequence of bin edges as numbers 
    plt.hist(data, bins=[0, 10, 20, 30])

Dead Ends

Common approaches that don't work:

  1. Using a list of integers but with mixed types 80% fail

    Bins must be numeric; mixed types cause conversion errors.

  2. Passing a single string like 'auto' but in a list 90% fail

    A list of one string is still a list, not a valid bins argument.