只是尝试下载 .CSV 文件中特定代码的历史收盘价，但是我在 yfinance 出于某种奇怪的原因提取数据时遇到问题。我有另一个文件，它似乎以相同的方式工作，并为我提供了完美的数据，我也将包括在内。我收到的错误可能是什么原因造成的？
在我看来，这两种方法应该以相同的方式有效地工作，所以我很困惑第二批代码如何能够如此干净地执行，而使用 .CSV 的方式会导致没有可用数据的错误。
# Not working code ----------
import pandas as pd
import yfinance as yf
from datetime import datetime
today = datetime.today().strftime('%Y-%m-%d')
tickers = pd.read_csv("Hardware.csv")
tickers = tickers["Symbol"].to_list()
print(tickers)
df = yf.download(tickers,'2022-1-1',today, auto_adjust=True)['Close']
print(df.head())
# Original working code ----------
import yfinance as yf
import pandas as pd
from datetime import datetime
today = datetime.today().strftime('%Y-%m-%d')
# Read and print the stock tickers that make up S&P500
tickers = pd.read_html(
'https://en.wikipedia.org/wiki/List_of_S%26P_500_companies')[0]
print(tickers.head())
# Get the data for this tickers from yahoo finance
df = yf.download(tickers.Symbol.to_list(),'2022-1-1',today, auto_adjust=True)['Close']
print(df.head())
# Error received from top code that doesn't work ----------
['AAPL ', 'CSCO ', 'ORCL ', 'IBM ', 'ROP ', 'ANET ', 'TEL ', 'MSI ', 'HPQ ', 'DELL ', 'GLW ', 'GRMN ', 'ZBRA ', 'HPE ', 'STX ', 'NTAP ', 'UI ', 'ROKU ', 'WDC ', 'FFIV ', 'JNPR ', 'PSTG ', 'SNX ', 'AXON ', 'CIEN ', 'JBL ', 'FLEX ', 'OLED ', 'DLB ', 'ARW ', 'LITE ', 'NTNX ', 'NCR ', 'ATC ', 'AVT ', 'FN ', 'VIAV ', 'VSAT ', 'SONO ', 'XRX ', 'VICR ', 'MAXR ', 'GSAT ', 'SANM ', 'NTCT ', 'PLXS ', 'CRDO ', 'DDD ', 'CRSR ', 'KN ', 'SMCI ', 'IDCC ', 'INFN ', 'VZIO ', 'POLY ', 'SSYS ', 'COMM ', 'EXTR ', 'TTMI ', 'DM ', 'GPRO ', 'CTS ', 'SNPO ', 'IMAX ', 'PAR ', 'ATEN ', 'ATEX ', 'HLIT ', 'CRGE ', 'KARO ', 'ADTN ', 'PBI ', 'CLFD ', 'BHE ', 'AUDC ', 'MVIS ', 'BOC ', 'ARLO ', 'MKFG ', 'NTGR ', 'CMBM ', 'SGHT ', 'ITRN ', 'DBD ', 'KODK ', 'RBBN ', 'VPG ', 'INSG ', 'VUZI ', 'CMTL ', 'UEIC ', 'DZSI ', 'CASA ', 'INVE ', 'AKTS ']
[*********************100%***********************] 95 of 95 completed
95 Failed downloads:
- RBBN : No data found, symbol may be delisted
- MKFG : No data found, symbol may be delisted
- SANM : No data found, symbol may be delisted
- IDCC : No data found, symbol may be delisted
- VUZI : No data found, symbol may be delisted
- MSI : No data found, symbol may be delisted
- MVIS : No data found, symbol may be delisted
- INSG : No data found, symbol may be delisted
- POLY : No data found, symbol may be delisted
- ROP : No data found, symbol may be delisted
- NTCT : No data found, symbol may be delisted
- ARW : No data found, symbol may be delisted
- TTMI : No data found, symbol may be delisted
- AXON : No data found, symbol may be delisted
- IBM : No data found, symbol may be delisted
- KODK : No data found, symbol may be delisted
- BHE : No data found, symbol may be delisted
- CMBM : No data found, symbol may be delisted
- CRGE : No data found, symbol may be delisted
- CASA : No data found, symbol may be delisted
- SGHT : No data found, symbol may be delisted
- VPG : No data found, symbol may be delisted
- SMCI : No data found, symbol may be delisted
- AKTS : No data found, symbol may be delisted
- TEL : No data found, symbol may be delisted
- DZSI : No data found for this date range, symbol may be delisted
- KN : No data found, symbol may be delisted
- WDC : No data found, symbol may be delisted
- ATEN : No data found, symbol may be delisted
- OLED : No data found, symbol may be delisted
- GLW : No data found, symbol may be delisted
- AAPL : No data found, symbol may be delisted
- IMAX : No data found, symbol may be delisted
- VIAV : No data found, symbol may be delisted
- UI : No data found, symbol may be delisted
- AVT : No data found, symbol may be delisted
- FFIV : No data found, symbol may be delisted
- ANET : No data found, symbol may be delisted
- NCR : No data found, symbol may be delisted
- ADTN : No data found, symbol may be delisted
- VSAT : No data found, symbol may be delisted
- FN : No data found, symbol may be delisted
- CSCO : No data found, symbol may be delisted
- DLB : No data found, symbol may be delisted
- CTS : No data found, symbol may be delisted
- XRX : No data found, symbol may be delisted
- DELL : No data found, symbol may be delisted
- INFN : No data found, symbol may be delisted
- VZIO : No data found, symbol may be delisted
- ORCL : No data found, symbol may be delisted
- AUDC : No data found, symbol may be delisted
- CRDO : No data found, symbol may be delisted
- ARLO : No data found, symbol may be delisted
- PAR : No data found, symbol may be delisted
- SONO : No data found, symbol may be delisted
- EXTR : No data found, symbol may be delisted
- SNPO : No data found, symbol may be delisted
- HPE : No data found, symbol may be delisted
- COMM : No data found, symbol may be delisted
- LITE : No data found, symbol may be delisted
- PSTG : No data found, symbol may be delisted
- ROKU : No data found, symbol may be delisted
- DBD : No data found, symbol may be delisted
- INVE : No data found, symbol may be delisted
- FLEX : No data found, symbol may be delisted
- PBI : No data found, symbol may be delisted
- CLFD : No data found, symbol may be delisted
- MAXR : No data found, symbol may be delisted
- DM : No data found, symbol may be delisted
- GSAT : No data found, symbol may be delisted
- ITRN : No data found, symbol may be delisted
- HLIT : No data found, symbol may be delisted
- ZBRA : No data found, symbol may be delisted
- KARO : No data found, symbol may be delisted
- HPQ : No data found, symbol may be delisted
- SSYS : No data found, symbol may be delisted
- PLXS : No data found, symbol may be delisted
- STX : No data found, symbol may be delisted
- JBL : No data found, symbol may be delisted
- VICR : No data found, symbol may be delisted
- BOC : No data found, symbol may be delisted
- CMTL : No data found, symbol may be delisted
- UEIC : No data found, symbol may be delisted
- GRMN : No data found, symbol may be delisted
- NTNX : No data found, symbol may be delisted
- NTGR : No data found, symbol may be delisted
- NTAP : No data found, symbol may be delisted
- ATC : No data found, symbol may be delisted
- CIEN : No data found, symbol may be delisted
- DDD : No data found, symbol may be delisted
- CRSR : No data found, symbol may be delisted
- ATEX : No data found, symbol may be delisted
- JNPR : No data found, symbol may be delisted
- GPRO : No data found, symbol may be delisted
- SNX : No data found, symbol may be delisted
Empty DataFrame
Columns: [(Adj Close, AAPL ), (Adj Close, ADTN ), (Adj Close, AKTS ), (Adj Close, ANET ), (Adj Close, ARLO ), (Adj Close, ARW ), (Adj Close, ATC ), (Adj Close, ATEN ), (Adj Close, ATEX ), (Adj Close, AUDC ), (Adj Close, AVT ), (Adj Close, AXON ), (Adj Close, BHE ), (Adj Close, BOC ), (Adj Close, CASA ), (Adj Close, CIEN ), (Adj Close, CLFD ), (Adj Close, CMBM ), (Adj Close, CMTL ), (Adj Close, COMM ), (Adj Close, CRDO ), (Adj Close, CRGE ), (Adj Close, CRSR ), (Adj Close, CSCO ), (Adj Close, CTS ), (Adj Close, DBD ), (Adj Close, DDD ), (Adj Close, DELL ), (Adj Close, DLB ), (Adj Close, DM ), (Adj Close, DZSI ), (Adj Close, EXTR ), (Adj Close, FFIV ), (Adj Close, FLEX ), (Adj Close, FN ), (Adj Close, GLW ), (Adj Close, GPRO ), (Adj Close, GRMN ), (Adj Close, GSAT ), (Adj Close, HLIT ), (Adj Close, HPE ), (Adj Close, HPQ ), (Adj Close, IBM ), (Adj Close, IDCC ), (Adj Close, IMAX ), (Adj Close, INFN ), (Adj Close, INSG ), (Adj Close, INVE ), (Adj Close, ITRN ), (Adj Close, JBL ), (Adj Close, JNPR ), (Adj Close, KARO ), (Adj Close, KN ), (Adj Close, KODK ), (Adj Close, LITE ), (Adj Close, MAXR ), (Adj Close, MKFG ), (Adj Close, MSI ), (Adj Close, MVIS ), (Adj Close, NCR ), (Adj Close, NTAP ), (Adj Close, NTCT ), (Adj Close, NTGR ), (Adj Close, NTNX ), (Adj Close, OLED ), (Adj Close, ORCL ), (Adj Close, PAR ), (Adj Close, PBI ), (Adj Close, PLXS ), (Adj Close, POLY ), (Adj Close, PSTG ), (Adj Close, RBBN ), (Adj Close, ROKU ), (Adj Close, ROP ), (Adj Close, SANM ), (Adj Close, SGHT ), (Adj Close, SMCI ), (Adj Close, SNPO ), (Adj Close, SNX ), (Adj Close, SONO ), (Adj Close, SSYS ), (Adj Close, STX ), (Adj Close, TEL ), (Adj Close, TTMI ), (Adj Close, UEIC ), (Adj Close, UI ), (Adj Close, VIAV ), (Adj Close, VICR ), (Adj Close, VPG ), (Adj Close, VSAT ), (Adj Close, VUZI ), (Adj Close, VZIO ), (Adj Close, WDC ), (Adj Close, XRX ), (Adj Close, ZBRA ), (Close, AAPL ), (Close, ADTN ), (Close, AKTS ), (Close, ANET ), (Close, ARLO ), ...]
Index: []
[0 rows x 570 columns]
您的股票代码名称中有尾随空格，这会导致股票代码名称无效。 G。
'AAPL ''AAPL'您可以通过替换来修复它：
df = yf.download(tickers.Symbol.to_list(),'2022-1-1',today, auto_adjust=True)['Close']
与：
df = yf.download(tickers.Symbol.str.strip().to_list(),'2022-1-1',today, auto_adjust=True)['Close']
尝试使用原始代码，例如，NSE 贴纸末尾有“.NS”后缀。 因此，您正在搜索的索引可能有一个您可能需要验证的后缀。
卸载yfinance并在cmd中重新下载
第1步：卸载当前版本的yfinance， pip uninstall -y yfinance.
第2步：安装当前版本的yfinance， pip 安装 yfinance