Python日期字符串mm / dd / yyyy到datetime

Question

I have to write a program where I take stocks from yahoo finance and print out certain information for the site. One of the pieces of data is the date. I need to take a date such as 3/21/2012 and converter to the following format: Mar 21, 2012.

Here is my code for the entire project.

def getStockData(company="GOOG"):

    baseurl ="http://quote.yahoo.com/d/quotes.csv?s={0}&f=sl1d1t1c1ohgvj1pp2owern&e=.csv"

    url = baseurl.format(company)
    conn = u.urlopen(url)
    content = conn.readlines()
    data = content[0].decode("utf-8")
    data = data.split(",")
    date = data[2][1:-1]
    date_new = datetime.strptime(date, "%m/%d/%Y").strftime("%B[0:3] %d, %Y")
    print("The last trade for",company, "was", data[1],"and the change was", data[4],"on", date_new)


company = input("What company would you like to look up?")
getStockData(company)


co = ["VOD.L", "AAPL", "YHOO", "S", "T"]
for company in co:
    getStockData(company)

Answer 1

You should really specify what about your code is not working (ie, what output are you getting that you don't expect? What error message are you getting, if any?). However, I suspect your problem is with this part:

strftime('%B[0:3] %d, %Y')

Since Python won't do what you think with that attempt to slice '%B' . You should instead use '%b' , which as noted in the documentation for strftime() , corresponds to the locale-abbreviated month name.

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EDIT

Here is a fully functional script based on what you posted above with my suggested modifications:

import urllib2 as u
from datetime import datetime

def getStockData(company="GOOG"):
    baseurl ="http://quote.yahoo.com/d/quotes.csv?s={0}&f=sl1d1t1c1ohgvj1pp2owern&e=.csv"

    url = baseurl.format(company)
    conn = u.urlopen(url)
    content = conn.readlines()
    data = content[0].decode("utf-8")
    data = data.split(",")
    date = data[2][1:-1]
    date_new = datetime.strptime(date, "%m/%d/%Y").strftime("%b %d, %Y")
    print("The last trade for",company, "was", data[1],"and the change was", data[4],"on", date_new)

for company in ["VOD.L", "AAPL", "YHOO", "S", "T"]:
    getStockData(company)

The output of this script is:

The last trade for VOD.L was 170.00 and the change was -1.05 on Mar 06, 2012
The last trade for AAPL was 530.26 and the change was -2.90 on Mar 06, 2012
The last trade for YHOO was 14.415 and the change was -0.205 on Mar 06, 2012
The last trade for S was 2.39 and the change was -0.04 on Mar 06, 2012
The last trade for T was 30.725 and the change was -0.265 on Mar 06, 2012

For what it's worth, I'm running this on Python 2.7.1. I also had the line from __future__ import print_function to make this compatible with the Python3 print function you appear to be using.

Answer 2

Check out Dateutil . You can use it to parse a string into python datetime object and then print that object using strftime.

I've since come to a conclusion that auto detection of datetime value is not always a good idea. It's much better to use strptime and specify what format you want.