使用 NSEPY 库获取股票数据时出现错误

Question

ticker = "INFY"
start_date = "2021-01-01"
end_date = "2022-12-31"
data = nsepy.get_history(symbol=ticker, start=start_date, end=end_date)

运行代码时得到

类型错误：不支持的操作数类型 -：“str”和“str”

我只想创建 RSI 指标

import nsepy
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

def RSI(data, n=14):
    '''
    Calculates the RSI (Relative Strength Index) for the given data.
    data: pandas dataframe containing the stock price data.
    n: the number of periods to consider for the RSI calculation.
    '''
    delta = data.diff()
    gain = delta[delta > 0].fillna(0).cumsum()
    loss = -delta[delta < 0].fillna(0).cumsum()
    avg_gain = gain.rolling(window=n).mean()
    avg_loss = loss.rolling(window=n).mean()
    rs = avg_gain / avg_loss
    rsi = 100 - (100 / (1 + rs))
    return rsi

# Get stock data using NSEPY library
ticker = "INFY"
start_date = "2020-01-01"
end_date = "2021-12-31"
data = nsepy.get_history(symbol=ticker, start=start_date, end=end_date)

# Calculate RSI
rsi = RSI(data["Close"], 14)

# Generate buy and sell signals
buy_signal = rsi < 30
sell_signal = rsi > 70

# Plot the RSI and buy/sell signals
plt.plot(rsi, label='RSI')
plt.plot(buy_signal*100, 'g^', label='Buy Signal')
plt.plot(sell_signal*100, 'rv', label='Sell Signal')
plt.legend()
plt.show()

如何解决，找不到解决办法

Answer 1

您可能正在计算导致 TypeError 的任意两个字符串变量。请准确解释编译器指示错误的是哪一行语句。

str1 = "Hello"
str2 = "World"
result = str1 - str2  # This will raise a TypeError