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series.py
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Created
Fri, Oct 18, 20:17
Size
2 KB
Mime Type
text/x-python
Expires
Sun, Oct 20, 20:17 (2 d)
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blob
Format
Raw Data
Handle
21769686
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R7571 SP4E-TB-TL-FR
series.py
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# -*- coding: utf-8 -*-
# @Author: Theo Lemaire
# @Date: 2018-10-16 11:32:08
# @Last Modified by: Theo Lemaire
# @Last Modified time: 2018-10-16 14:34:50
import
math
from
argparse
import
ArgumentParser
class
Series
:
def
__init__
(
self
):
self
.
current_term
=
0
self
.
current_value
=
0
def
compute
(
self
,
N
):
raise
Exception
(
"pure virtual function"
)
def
getAnalyticPrediction
(
self
):
raise
Exception
(
"pure virtual function"
)
class
ComputeArithmetic
(
Series
):
def
__init__
(
self
):
super
()
.
__init__
()
def
__str__
(
self
):
return
'ComputeArithmetic'
def
compute
(
self
,
N
):
# series_value = 0
series_value
=
self
.
current_value
# for k in range(1, N + 1):
for
k
in
range
(
self
.
current_term
+
1
,
N
+
1
):
series_value
+=
k
self
.
current_term
=
N
self
.
current_value
=
series_value
return
self
.
current_value
class
ComputePi
(
Series
):
def
__init__
(
self
):
super
()
.
__init__
()
def
__str__
(
self
):
return
'ComputePi'
def
compute
(
self
,
N
):
# sum = 0
sum
=
self
.
current_value
**
2
/
6
# for k in range(1, N + 1):
for
k
in
range
(
self
.
current_term
+
1
,
N
+
1
):
sum
+=
1
/
k
**
2
self
.
current_term
=
N
self
.
current_value
=
math
.
sqrt
(
6
*
sum
)
return
self
.
current_value
def
getAnalyticPrediction
(
self
):
return
math
.
pi
def
main
():
# Define argument parser
ap
=
ArgumentParser
()
ap
.
add_argument
(
'-n'
,
'--niter'
,
type
=
int
,
default
=
5
,
help
=
'Number of iterations'
)
ap
.
add_argument
(
'-s'
,
'--seriestype'
,
type
=
str
,
default
=
'Ar'
,
help
=
'Series type (Ar or Pi)'
)
# Parse arguments
args
=
ap
.
parse_args
()
n
=
args
.
niter
s
=
args
.
seriestype
.
lower
()
if
n
<
0
:
raise
ValueError
(
'N must be positive'
)
# Instantiate appropriate series
if
s
==
'ar'
:
obj
=
ComputeArithmetic
()
elif
s
==
'pi'
:
obj
=
ComputePi
()
else
:
raise
ValueError
(
'Unknown series type'
)
# Call compute method
print
(
'{}({}) = {}'
.
format
(
obj
,
n
,
obj
.
compute
(
n
)))
if
__name__
==
'__main__'
:
main
()
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