如何读取列表中的两个元素？相关Python代码技术咨询

Let’s walk through the problems in your current code and fix them to get the functionality you need:

Key Issues in the Original Code #

• Incorrect indexing with zip: When you use zip(div, pares), each loop iteration returns a tuple of paired elements (one from div, one from pares)—not an index. Trying to use this tuple as an index (like pares[j]) will throw a TypeError because tuples can’t be used to index lists.
• Variable name typo: You assigned dtm=pares[j] but then referenced dfm in the Candlestick call—this is a typo that would cause a NameError.
• Unnecessary index lookup: Since zip already pairs elements directly, you don’t need to look up elements by index at all.

Corrected Code #

import plotly.graph_objects as go

def ch1(div, pares):
    # Unpack paired elements directly from zip()
    for etiqueta, dfm in zip(div, pares):
        # Create candlestick figure with the paired label and DataFrame
        fig = go.Figure(data=[go.Candlestick(
            x=dfm['Date'],
            open=dfm['Open'],
            high=dfm['High'],
            low=dfm['Low'],
            close=dfm['Price']
        )])
        fig.update_layout(
            title=etiqueta,
        )
        fig.show()

What Changed? #

• We replaced for j in zip(div,pares): with for etiqueta, dfm in zip(div,pares):—this directly unpacks each pair into a label (etiqueta from div) and a DataFrame (dfm from pares), which is exactly what you need for each chart.
• Removed the incorrect index-based assignments (dtm=pares[j] and etiqueta=div[j]) since we’re already getting these values directly from the zip loop.
• Fixed the implicit typo by using dfm consistently (assuming pares contains pandas DataFrames with the required columns).

Notes to Ensure It Works #

• Make sure every element in pares is a pandas DataFrame that has the columns Date, Open, High, Low, and Price.
• Ensure div and pares are the same length—if one is longer than the other, zip will stop at the shorter list’s length.

内容的提问来源于stack exchange，提问作者Pedro Puertas