Mercurial > hg > GlobalNeighbors

annotate globalneighbors/read.py @ 21:22c384fe954d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add locations to grid; not used or tested yet
author Jeff Hammel <k0scist@gmail.com>
date Sun, 25 Jun 2017 16:28:56 -0700
parents 7e27e874655b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
1 """
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
2 I/O
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
3 """
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
4
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
5 import csv
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
6 import sys
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
7 from .schema import cast_row
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
8 from .schema import types
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
9
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
10 # TSV notes for python `csv` library:
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
11 # https://stackoverflow.com/questions/15063936/csv-error-field-larger-than-field-limit-131072
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
12
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
13 string = (str, basestring)
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
14
1
1b94f3bf97e5 * limit distance function
Jeff Hammel <k0scist@gmail.com>
parents: 0
diff changeset
15
0
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
16 def read_tsv_generator(f):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
17 """read tab-separated values from file `f` into memory"""
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
18
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
19 reader = csv.reader(f,
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
20 delimiter='\t',
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
21 quoting=csv.QUOTE_NONE)
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
22 for row in reader:
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
23 yield row
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
24
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
25 def read_tsv(f):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
26 if isinstance(f, string):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
27 with open(f) as f_:
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
28 return read_tsv(f_)
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
29
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
30 return [row for row in read_tsv_generator(f)]
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
31
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
32
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
33 def read_cities(f, fields=None, types=types):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
34 """read and cast cities into a form we want"""
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
35
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
36 for index, row in enumerate(read_tsv_generator(f)):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
37 try:
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
38 cast = cast_row(row, types=types)
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
39 except AssertionError:
5
7e27e874655b test a larger grid + move distance insertion to its own function
Jeff Hammel <k0scist@gmail.com>
parents: 1
diff changeset
40 sys.stderr.write("Error, row {}\n{}\n".format(index, row))
0
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
41 raise
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
42 if fields:
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
43 cast = {key: value for key, value in cast.items()
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
44 if key in fields}
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
45 yield cast
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
46
1
1b94f3bf97e5 * limit distance function
Jeff Hammel <k0scist@gmail.com>
parents: 0
diff changeset
47
0
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
48 def read_city_list(f, fields=None, types=types):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
49 """read cities as a list"""
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
50
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
51 if isinstance(f, string):
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
52 with open(f) as f_:
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
53 return read_city_list(f_, fields=fields, types=types)
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
54
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
55 return [city for city in
5dba84370182 initial commit; half-working prototype
Jeff Hammel <k0scist@gmail.com>
parents:
diff changeset
56 read_cities(f, fields=fields, types=types)]