Python - "Struct arrays"

You want to create a class which contains name and place fields.

class Baz():
 "Stores name and place pairs"
 def __init__(self, name, place):
 self.name = name
 self.place = place

Then you'd use a list of instances of that class.

my_foos = []
my_foos.append(Baz("foo", "Shop"))
my_foos.append(Baz("bar", "Home"))

See also: classes (from the Python tutorial).

That's what named tuples are for.

http://docs.python.org/dev/library/collections.html#namedtuple-factory-function-for-tuples-with-named-fields

How about a list of dicts?

mydictlist = [{"name":"foo", "place":"Shop"},
 {"name":"bar", "place":"Home"}]

Then you can do

>>> mydictlist[0]["name"]
'foo'
>>> mydictlist[1]["place"]
'Home'

and so on...

Using your sample file:

mydictlist = []
with open("test.txt") as f:
 for line in f:
 entries = line.strip().split(" ", 5) # split along spaces max. 5 times
 mydictlist.append({"name": entries[0],
 "time1": entries[1],
 "time2": entries[2],
 "etc": entries[5]})

gives you:

[{'etc': 'Vizfoldrajz EA eloadas 1', 'name': 'Hetfo', 'time2': '10:00', 'time1': '8:00'}, 
 {'etc': 'Termeszetfoldrajzi szintezis EA eloadas 1', 'name': 'Hetfo', 'time2': '14:00', 'time1': '12:00'}, 
 {'etc': 'Scriptnyelvek eloadas 1', 'name': 'Hetfo', 'time2': '16:00', 'time1': '14:00'}
 ...]

IIt depends of what you have as data.

If all that you want is to store names and places as string, I would suggest:

A list of namedtuples [(name="foo", place="Shop"), (name="bar", place="Home")]

For almost all cases, a Python list is analogous to a C array. Python has an array module, but that is a thin wrapper around actual C arrays, so I wouldn't use that unless you need to expose something to/from C.

Also, a struct can easily be represented as an object. Something like:

class Data(object):
 def __init__(self, name, place):
 self.name = name
 self.place = place

Then you want to loop through the file, line by line, and populate:

my_list = []
with open("myfile.txt") as f:
 for line in f.readlines():
 # line is each line in the file
 # let's pretend our file structure is "NAME PLACE"
 data = line.split() # data[0] = name, data[1] = place
 my_list.append(Data(data[0], data[1]))
# my_list now contains objects of class Data, which has members name and place

That should be enough of a starting point to get you moving and help you understand how to do basic file/class/list operations.

class Struct:
 def __init__(self, name, place):
 self.name = name
 self.place = place
structs = []
structs.append(Struct("foo","bar"))
structs.append(Struct("other_foo","other_bar"))

You could use a dict or make a small class.

>>> s = [{'name': 'foo', 'place': 'shop'}, {'name': 'bar', 'place': 'home'}]
>>> s[0]['name']
'foo'

Also, I would recommend not naming it 'struct' in python since that is a python module.

Don't see why to take so much pain

class your_struct(): 
 def __init__(self, value, string):
 self.num = value
 self.string = string
C = [[ your_struct(0,'priyank') for j in range(len(n)) ] for i in 
 range(len(n)) ]
 # for 2-D Matrix
C = [ your_struct(0,'priyank') for j in range(len(n)) ] // for 1-D array 

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• arrays
• struct