Mercurial > hg > numerics
annotate numerics/convert.py @ 60:e3c3ee7b5ccf
stubbing manipulate data
| author | Jeff Hammel <k0scist@gmail.com> |
|---|---|
| date | Thu, 22 Jan 2015 13:33:56 -0800 |
| parents | 3781174542bb |
| children | 202ab51601b4 |
| rev | line source |
|---|---|
| 27 | 1 #!/usr/bin/env python |
| 2 | |
| 3 """ | |
| 4 convert between types | |
| 5 """ | |
| 6 | |
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ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
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7 # imports |
| 31 | 8 import argparse |
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ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
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9 import csv |
| 27 | 10 import sys |
| 52 | 11 from .data import transpose |
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6d34c02f7c9c
inherit from the right thing
Jeff Hammel <k0scist@gmail.com>
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12 from .read import read_csv, CSVParser |
| 27 | 13 |
| 33 | 14 __all__ = ['cast', 'float_or_orig', 'main'] |
| 15 | |
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ef915968d104
put this in the parser so that i can use this in convert
Jeff Hammel <k0scist@gmail.com>
parents:
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16 default_cast = (int, float, str) |
| 6 | 17 |
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serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
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18 def cast(to_type, *values): |
| 33 | 19 |
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serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
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20 retval = [] |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
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21 for value in values: |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
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22 try: |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
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23 retval.append(to_type(value)) |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
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24 except ValueError: |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
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25 retval.append(value) |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
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26 return retval |
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d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
|
27 |
| 33 | 28 |
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5
d5447d401c44
serializaion; pandas probably does this
Jeff Hammel <k0scist@gmail.com>
parents:
diff
changeset
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29 def float_or_orig(*values): |
| 33 | 30 return cast([float], *values) |
| 31 | |
| 32 | |
| 34 | 33 def column_type(values, types=default_cast): |
| 34 """determine the type of a column""" | |
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55
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
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35 for t in types: |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
36 for value in values: |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
37 try: |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
38 t(value) |
| 56 | 39 except ValueError, TypeError: |
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55
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
40 break |
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ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
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41 else: |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
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42 return t |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
43 |
| 34 | 44 raise NotImplementedError('TODO') # -> record TODO items |
| 45 | |
| 59 | 46 def cast_columns(columns, types=default_cast): |
| 33 | 47 """ |
| 48 cast a column of data | |
| 49 """ | |
| 59 | 50 column_types = [column_type(column) for column in columns] |
| 60 | 51 return [[column_type(row) for row in column] |
| 52 for column_type, column in zip(column_types, columns)] | |
| 27 | 53 |
| 59 | 54 |
| 27 | 55 def main(args=sys.argv[1:]): |
| 56 """CLI""" | |
| 57 | |
| 31 | 58 # parse command line |
|
47
6d34c02f7c9c
inherit from the right thing
Jeff Hammel <k0scist@gmail.com>
parents:
46
diff
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59 parser = CSVParser(description="interpolate types from file") |
| 31 | 60 options = parser.parse_args(args) |
| 61 | |
| 32 | 62 # read CSV file |
| 46 | 63 data = parser.read() |
| 64 | |
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55
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
65 # transpose |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
66 columns = transpose(data) |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
67 |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
68 # get types |
|
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
|
69 types = [column_type(column) for column in columns] |
| 46 | 70 |
| 71 # print type information | |
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55
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
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72 writer = csv.writer(sys.stdout) |
| 56 | 73 writer.writerow([t.__name__ for t in types]) |
|
55
ecaf1d4b1c2c
this should work now; it doesnt, but it should
Jeff Hammel <k0scist@gmail.com>
parents:
52
diff
changeset
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74 |
| 32 | 75 |
| 27 | 76 if __name__ == '__main__': |
| 77 main() |