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Fixing Some Minor Issues (#1386)

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* Replacing mutable default argument in __init__

* Fixing typo mistakes in lib.py

* Simplifying chained comparisons

* Update lib.py
This commit is contained in:
Milad Sadeghi DM 2019-10-17 21:43:28 +03:30 committed by Christian Clauss
parent 927a8c7722
commit 63d8cadc3e
1 changed files with 9 additions and 7 deletions
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16
linear_algebra/src/lib.py
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@ -27,7 +27,7 @@ import random
class Vector(object):
"""
This class represents a vector of arbitray size.
This class represents a vector of arbitrary size.
You need to give the vector components.
Overview about the methods:
@ -46,11 +46,13 @@ class Vector(object):
TODO: compare-operator
"""
def __init__(self, components=[]):
def __init__(self, components=None):
"""
input: components or nothing
simple constructor for init the vector
"""
if components is None:
components = []
self.__components = list(components)
def set(self, components):
@ -112,7 +114,7 @@ class Vector(object):
"""
input: other vector
assumes: other vector has the same size
returns a new vector that represents the differenz.
returns a new vector that represents the difference.
"""
size = len(self)
if size == len(other):
@ -136,7 +138,7 @@ class Vector(object):
summe += self.__components[i] * other.component(i)
return summe
else: # error case
raise Exception("invalide operand!")
raise Exception("invalid operand!")
def copy(self):
"""
@ -223,7 +225,7 @@ class Matrix(object):
def __init__(self, matrix, w, h):
"""
simple constructor for initialzes
simple constructor for initializing
the matrix with components.
"""
self.__matrix = matrix
@ -249,7 +251,7 @@ class Matrix(object):
"""
changes the x-y component of this matrix
"""
if x >= 0 and x < self.__height and y >= 0 and y < self.__width:
if 0 <= x < self.__height and 0 <= y < self.__width:
self.__matrix[x][y] = value
else:
raise Exception("changeComponent: indices out of bounds")
@ -258,7 +260,7 @@ class Matrix(object):
"""
returns the specified (x,y) component
"""
if x >= 0 and x < self.__height and y >= 0 and y < self.__width:
if 0 <= x < self.__height and 0 <= y < self.__width:
return self.__matrix[x][y]
else:
raise Exception("changeComponent: indices out of bounds")