我有一个字典列表listEntries
。当我在IPython中说print listEntries
时,我得到以下输出。你知道吗
[{'div': ' ',
'id': ' EE 760 ',
'instructor': 'Narayanan H.',
'instructor_type': 'I ',
'name': 'Advanced Network Analysis',
'slot': '3 ',
'student': '28'},
{'div': ' ',
'id': ' EE 764 ',
'instructor': 'Karandikar Abhay',
'instructor_type': 'I ',
'name': 'Wireless & Mobile Communication',
'slot': '1 ',
'student': '36'}]
但是当我做a = listEntries[0]
然后print a
时,我得到的只是{}
。你知道吗
更新:当我使用pop方法时,我得到了预期的行为。我通过解析csv文件创建了这个列表。你知道吗
这是密码。你知道吗
import os
import csv
file1 = open('./data.txt', 'r');
csv1 = csv.reader(file1);
listEntry = list();
for row in csv1 :
# if first row is a number then this row represent course.
course = {}
if row[0].isdigit() :
course['id'] = row[1]
course['name'] = row[2]
course['instructor'] = row[3]
course['instructor_type'] = row[4]
course['slot'] = row[5]
course['div'] = row[6]
course['student'] = row[7]
else : pass
listEntry.append(course);
print listEntry[0]
这是文件数据.txt我正在分析。我用的是python2.7
"Running courses for year 2005-2006 and semester 2 "
" 1991-1992 1992-1993 1993-1994 1994-1995 1995-1996 1996-1997 1997-1998 1998-1999 1999-2000 2000-2001 2001-2002 2002-2003 2003-2004 2004-2005 2005-2006 2006-2007 2007-2008 2008-2009 2009-2010 2010-2011 2011-2012 2012-2013 1 - Autumn 2 - Spring 3 - Summer 4 - winter "
"Instructor Status A=Associate"
"Sr no.","Course Code","Course Name","Instructor Name","Instructor Status","Slot","Division","Enrolled students","Biometric Attendance Enabled?","Registration Limit","Restrictions","Division"
"67"," EE 760 ","Advanced Network Analysis","Narayanan H.","I ","3 "," ","28","-","0","",""
"68"," EE 764 ","Wireless & Mobile Communication","Karandikar Abhay","I ","1 "," ","36","-","0","",""
你发布的内容非常好:
这是个愚蠢的错误。显然,txt文件的前几行创建了空字典,并将它们推送到listEntries。你知道吗
修复了问题。你知道吗
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