4
株のリストの在庫情報を取得するためのスクリプトを作成しました。関係する株式(groupbyのグループ)については、私はMACDを計算する必要があります。は、python pandas経由でMACDを計算することができません
在庫の価格を他のものと混ぜないように、私はパンダグループを使用します。
# -*- coding: utf-8 -*-
import pandas as pd
from pandas.io.data import DataReader
import numpy as np
import time
from io import StringIO
runstart = time.time() # Start script timer
stocklist = ['nflx','mmm']
tickers = []
days_backtest=102 # MA98 kræver 102 d for at virke!
end = pd.Timestamp.utcnow()
start = end - days_backtest * pd.tseries.offsets.BDay()
# Fetch stockinfo
def GetStock(stocklist, start, end, csv_file_all='alltickers_ohlc.csv'):
'''
Fetches stock-info for analysis of each ticker in stocklist
'''
print('\nGetting Stock-info from Yahoo-Finance')
for ticker in stocklist:
r = DataReader(ticker, "yahoo",
start = start, end = end)
# add a symbol column
r['Ticker'] = ticker
tickers.append(r)
# concatenate all the dfs
df_all = pd.concat(tickers)
# add col without space in adj close
df_all['Adj_Close'] = df_all['Adj Close']
#define df with the columns that i need These can be put back in df_all
df_all = df_all[['Ticker','Adj_Close','Volume']] #'Adj Close','Open','High','Low',
# round to 2 dig.
# df_all['Open'] = np.round(df_all['Open'], decimals=2)
# df_all['High'] = np.round(df_all['High'], decimals=2)
# df_all['Low'] = np.round(df_all['Low'], decimals=2)
# df_all['Adj Close'] = np.round(df_all['Adj Close'], decimals=2)
df_all['Adj_Close'] = np.round(df_all['Adj_Close'], decimals=2)
# # Test the first 3 rows of each group for 'Difference' col transgress groups...
# df_all_test = df_all.groupby('Ticker').head(27).reset_index().set_index('Date')
# print ('\n df_all_test (27d summary from df) (Output)\n',df_all_test,'\n')
# saving to a csv #
df_all.reset_index().sort(['Ticker', 'Date'], ascending=[1,1]).set_index('Ticker').to_csv(csv_file_all, date_format='%Y/%m/%d')
# df_all.sort_index(inplace=True) # Sorts rows from date, mingling tickers - not wanted
print('========= Picked up new stockinfo (df_all) \n')
# print ('df_all.tail (Input)\n',df_all.tail(6),'\n')
print(70 * '-')
# print(df_all)
return df_all
def moving_average(group, n=9, type='simple'):
"""
compute an n period moving average.
type is 'simple' | 'exponential'
"""
group = np.asarray(df_['Adj_Close'])
if type == 'simple':
weights = np.ones(n)
else:
weights = np.exp(np.linspace(-1., 0., n))
weights /= weights.sum()
a = np.convolve(group, weights, mode='full')[:len(group)]
a[:n] = a[n]
return a
# return pd.DataFrame({'MCD_Sign':a})
def moving_average_convergence(group, nslow=26, nfast=12):
"""
compute the MACD (Moving Average Convergence/Divergence) using a fast and slow exponential moving avg'
return value is emaslow, emafast, macd which are len(x) arrays
"""
emaslow = moving_average(group, nslow, type='exponential')
emafast = moving_average(group, nfast, type='exponential')
# return emaslow, emafast, emafast - emaslow
return pd.DataFrame({'emaSlw': emaslow,
'emaFst': emafast,
'MACD': emafast - emaslow})
if __name__ == '__main__':
### Getstocks
df_all = GetStock(stocklist, start, end)
### Sort DF
df_all.reset_index().sort(['Ticker', 'Date'], ascending=[1,1]).set_index('Ticker')
### groupby screeener (filtering to only rel ticker group)
df_ = df_all.set_index('Ticker', append=True)
''' Calculating all the KPIs via groupby (filtering pr ticker)'''
grouped = df_.groupby(level=1).Adj_Close
nslow = 26
nfast = 12
nema = 9
df_[['emaSlw', 'emaFst', 'MACD']] = df_.groupby(level=1).Adj_Close.apply(moving_average_convergence)
df_['MCD_Sign'] = df_.groupby(level=1).Adj_Close.apply(moving_average)
print ('(Output df)\n',df_,'\n')
df = df_.reset_index('Ticker')
# Test the last row of each group for new numbers pr group...
df_test = df.groupby('Ticker').tail(1).reset_index().set_index('Date')
print ('df_test (summary from df) (Output)\n',df_test,'\n')
すべてのMACD番号の列には結果が表示されません。だからどこかで計算が遅くなる。間違って何が起こっているか私は...のよう見当もつかない
出力ラインのPRの株式ティッカー:君たちの
df_test (summary from df) (Output)
Ticker Adj_Close Volume emaSlw emaFst MACD MCD_Sign
Date
2016-07-07 nflx 95.10 9902700 NaN NaN NaN NaN
2016-07-07 mmm 174.87 1842300 NaN NaN NaN NaN
どれ...先端!?