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data scrappers
python task
Commits
88074bd0
Commit
88074bd0
authored
Jun 02, 2019
by
sainath taidalwar
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parent
b84536cc
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#21820
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records2.py
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88074bd0
with
open
(
'Sample.csv'
,
'r'
)
as
f
:
for
line
in
f
:
line
=
line
.
strip
()
row
=
line
.
split
(
','
)
print
(
row
)
from
tabulate
import
tabulate
import
csv
myrows
=
[]
records
=
[]
with
open
(
'Sample.csv'
,
'r'
)
as
f
:
r
=
csv
.
DictReader
(
f
)
for
row
in
r
:
records
.
append
(
row
)
print
(
records
)
from
collections
import
OrderedDict
def
select_cols
(
records
,
columns
):
new_records
=
[]
for
record
in
records
:
new_record
=
OrderedDict
()
for
c
in
columns
:
new_record
[
c
]
=
record
[
c
]
new_records
.
append
(
new_record
)
return
new_records
select_cols
(
records
,[
'Names'
,
'CGPA'
])
def
print_records_fancy
(
records
):
xyz
=
list
(
records
[
0
].
keys
())
recs
=
[]
for
record
in
records
:
recs
.
append
(
list
(
record
.
values
()))
print
(
tabulate
(
recs
,
headers
=
xyz
))
student
=
select_cols
(
records
,
[
'Names'
,
'CGPA'
])
print_records_fancy
(
student
)
def
check_constraints
(
record
,
constraints
):
all_okay
=
True
for
col
,
cs
in
constraints
.
items
():
csop
=
cs
[
0
]
csval
=
cs
[
1
]
if
csop
in
[
'EQ'
,
'GT'
,
'LT'
]:
if
csop
==
'EQ'
and
record
[
col
]
!=
csval
:
return
False
elif
csop
==
'GT'
and
float
(
record
[
col
])
<=
float
(
csval
):
return
False
elif
csop
==
'LT'
and
float
(
record
[
col
])
>=
float
(
csval
):
return
False
else
:
return
False
return
all_okay
def
filter_records
(
columns
=
[],
constraints
=
{}):
f_records
=
[]
if
len
(
columns
)
==
0
:
columns
=
list
(
records
[
0
].
keys
())
for
record
in
records
:
new_record
=
OrderedDict
()
if
check_constraints
(
record
,
constraints
):
for
col
in
columns
:
new_record
[
col
]
=
record
[
col
]
f_records
.
append
(
new_record
)
return
f_records
def
len_records
(
records
):
rec_len
=
len
(
records
)
return
[
OrderedDict
({
'Length'
:
rec_len
})]
def
print_records
(
records
):
headers
=
list
(
records
[
0
].
keys
())
print
(
"
\t
"
.
join
(
headers
))
for
record
in
records
:
print
(
"
\t
"
.
join
(
list
(
record
.
values
())))
def
print_records_fancy
(
records
):
headers
=
list
(
records
[
0
].
keys
())
recs
=
[]
for
record
in
records
:
recs
.
append
(
list
(
record
.
values
()))
print
(
tabulate
(
recs
,
headers
=
headers
))
print_records_fancy
(
filter_records
(
constraints
=
{
'College'
:
[
'EQ'
,
'CMREC'
]})
)
def
sum_records
(
records
,
columns
):
sums
=
OrderedDict
()
for
col
in
columns
:
sums
[
col
]
=
0
for
record
in
records
:
for
col
in
columns
:
sums
[
col
]
+=
float
(
record
[
col
])
return
[
sums
]
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