Python - How do I call class method from another newly modified python file

I'm new in python programming and would like to seek help in calling a method from another newly modified python file.

I currently have 3 python files: main.py, addBody.py, and originalBody.py.

The addBody will add one segment of the body to originalBody.py in each iteration. This is done by read and write function.

For example,

in the first iteration (initiated from main.py), originalBody.py will look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

in second iteration, originalBody.py will automatically look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        object2 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

        bodySegment[1] = 2  #two body

When I'm trying to call the class from main.py,

main.py

from originalBody import BODY



for i in range (0,10):



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = BODY()

    print(parent.bodySegment)

in the first iteration it runs smoothly:

{0: 1}

In the second iteration, after adding the body segment to originalBody.py, supposedly the result is expected to print out:

{0: 1, 1: 2}

However, it prints out the result from the first iteration:

{0: 1}

I suspect that my code calls the function from the original version of originalBody.py that has not modified yet. Do I need to add in some code in my main to get the class method from the modified version of originalBody? Or do I need to add in time delay to call the method right after the modification of originalBody?

asked Nov 21 '18 at 15:57

Nadiah Naz

162

Seems you may want to reload the file? Did you look into imp---particularly load_source?

– mattsap
Nov 21 '18 at 15:58

So you modify your already loaded code at runtime? Why?

– MisterMiyagi
Nov 21 '18 at 16:09

@mattsap should be considered as that since I want to directly get the modified file. I haven't look into that yet, will try to search for it

– Nadiah Naz
Nov 21 '18 at 16:37

@MisterMiyagi I wanna let the system to modify the code by itself to automatically add body segment in each iteration

– Nadiah Naz
Nov 21 '18 at 16:40

It is unclear why that needs modifying the original class and especially the source code. Subclassing would allow representing distinct classes with different capabilities, and eval would allow reusability. Currently, every time you run the program more body parts are added...

– MisterMiyagi
Nov 21 '18 at 16:47

|
show 1 more comment

I'm new in python programming and would like to seek help in calling a method from another newly modified python file.

I currently have 3 python files: main.py, addBody.py, and originalBody.py.

The addBody will add one segment of the body to originalBody.py in each iteration. This is done by read and write function.

For example,

in the first iteration (initiated from main.py), originalBody.py will look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

in second iteration, originalBody.py will automatically look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        object2 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

        bodySegment[1] = 2  #two body

When I'm trying to call the class from main.py,

main.py

from originalBody import BODY



for i in range (0,10):



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = BODY()

    print(parent.bodySegment)

in the first iteration it runs smoothly:

{0: 1}

In the second iteration, after adding the body segment to originalBody.py, supposedly the result is expected to print out:

{0: 1, 1: 2}

However, it prints out the result from the first iteration:

{0: 1}

asked Nov 21 '18 at 15:57

Nadiah Naz

162

Seems you may want to reload the file? Did you look into imp---particularly load_source?

– mattsap
Nov 21 '18 at 15:58

So you modify your already loaded code at runtime? Why?

– MisterMiyagi
Nov 21 '18 at 16:09

@mattsap should be considered as that since I want to directly get the modified file. I haven't look into that yet, will try to search for it

– Nadiah Naz
Nov 21 '18 at 16:37

@MisterMiyagi I wanna let the system to modify the code by itself to automatically add body segment in each iteration

– Nadiah Naz
Nov 21 '18 at 16:40

It is unclear why that needs modifying the original class and especially the source code. Subclassing would allow representing distinct classes with different capabilities, and eval would allow reusability. Currently, every time you run the program more body parts are added...

– MisterMiyagi
Nov 21 '18 at 16:47

|
show 1 more comment

I'm new in python programming and would like to seek help in calling a method from another newly modified python file.

I currently have 3 python files: main.py, addBody.py, and originalBody.py.

The addBody will add one segment of the body to originalBody.py in each iteration. This is done by read and write function.

For example,

in the first iteration (initiated from main.py), originalBody.py will look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

in second iteration, originalBody.py will automatically look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        object2 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

        bodySegment[1] = 2  #two body

When I'm trying to call the class from main.py,

main.py

from originalBody import BODY



for i in range (0,10):



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = BODY()

    print(parent.bodySegment)

in the first iteration it runs smoothly:

{0: 1}

In the second iteration, after adding the body segment to originalBody.py, supposedly the result is expected to print out:

{0: 1, 1: 2}

However, it prints out the result from the first iteration:

{0: 1}

asked Nov 21 '18 at 15:57

Nadiah Naz

162

I'm new in python programming and would like to seek help in calling a method from another newly modified python file.

I currently have 3 python files: main.py, addBody.py, and originalBody.py.

The addBody will add one segment of the body to originalBody.py in each iteration. This is done by read and write function.

For example,

in the first iteration (initiated from main.py), originalBody.py will look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

in second iteration, originalBody.py will automatically look like:

class BODY:

    def __init__(self):

        object1 = send_cylinder(length = 1.0, radius = 0.1)

        object2 = send_cylinder(length = 1.0, radius = 0.1)

        bodySegment = {}

        bodySegment[0] = 1  #one body

        bodySegment[1] = 2  #two body

When I'm trying to call the class from main.py,

main.py

from originalBody import BODY



for i in range (0,10):



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = BODY()

    print(parent.bodySegment)

in the first iteration it runs smoothly:

{0: 1}

In the second iteration, after adding the body segment to originalBody.py, supposedly the result is expected to print out:

{0: 1, 1: 2}

However, it prints out the result from the first iteration:

{0: 1}

python-3.x class methods

asked Nov 21 '18 at 15:57

Nadiah Naz

162

asked Nov 21 '18 at 15:57

Nadiah Naz

162

asked Nov 21 '18 at 15:57

Nadiah Naz

162

asked Nov 21 '18 at 15:57

Nadiah Naz

162

asked Nov 21 '18 at 15:57

Nadiah Naz

162

Seems you may want to reload the file? Did you look into imp---particularly load_source?

– mattsap
Nov 21 '18 at 15:58

So you modify your already loaded code at runtime? Why?

– MisterMiyagi
Nov 21 '18 at 16:09

@mattsap should be considered as that since I want to directly get the modified file. I haven't look into that yet, will try to search for it

– Nadiah Naz
Nov 21 '18 at 16:37

@MisterMiyagi I wanna let the system to modify the code by itself to automatically add body segment in each iteration

– Nadiah Naz
Nov 21 '18 at 16:40

It is unclear why that needs modifying the original class and especially the source code. Subclassing would allow representing distinct classes with different capabilities, and eval would allow reusability. Currently, every time you run the program more body parts are added...

– MisterMiyagi
Nov 21 '18 at 16:47

|
show 1 more comment

Seems you may want to reload the file? Did you look into imp---particularly load_source?

– mattsap
Nov 21 '18 at 15:58

So you modify your already loaded code at runtime? Why?

– MisterMiyagi
Nov 21 '18 at 16:09

@mattsap should be considered as that since I want to directly get the modified file. I haven't look into that yet, will try to search for it

– Nadiah Naz
Nov 21 '18 at 16:37

@MisterMiyagi I wanna let the system to modify the code by itself to automatically add body segment in each iteration

– Nadiah Naz
Nov 21 '18 at 16:40

It is unclear why that needs modifying the original class and especially the source code. Subclassing would allow representing distinct classes with different capabilities, and eval would allow reusability. Currently, every time you run the program more body parts are added...

– MisterMiyagi
Nov 21 '18 at 16:47

Seems you may want to reload the file? Did you look into imp---particularly load_source?

– mattsap
Nov 21 '18 at 15:58

So you modify your already loaded code at runtime? Why?

– MisterMiyagi
Nov 21 '18 at 16:09

@mattsap should be considered as that since I want to directly get the modified file. I haven't look into that yet, will try to search for it

– Nadiah Naz
Nov 21 '18 at 16:37

@MisterMiyagi I wanna let the system to modify the code by itself to automatically add body segment in each iteration

– Nadiah Naz
Nov 21 '18 at 16:40

It is unclear why that needs modifying the original class and especially the source code. Subclassing would allow representing distinct classes with different capabilities, and eval would allow reusability. Currently, every time you run the program more body parts are added...

– MisterMiyagi
Nov 21 '18 at 16:47

|
show 1 more comment

1 Answer
1

active

oldest

votes

You can reload a module when it has already been imported by using the reload builtin function.

I edited your code using import originalBody because I am not sure how the reload function works with the from x import y syntax.

Code below:

from importlib import reload

import originalBody



for i in range (0,10):

    reload(originalBody)



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = originalBody.BODY()

    print(parent.bodySegment)

answered Nov 21 '18 at 15:59

FMarazzi

328213

Thanks a lot! It helps to solve my issue. Just that reload() is for python 2. In my case for python 3.3, 'import imp imp.reload()' will do the trick

– Nadiah Naz
Nov 21 '18 at 16:49

Sorry, I should have specified the version. Anyway, reload exists since python 3.4 onwards!

– FMarazzi
Nov 21 '18 at 17:04

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

You can reload a module when it has already been imported by using the reload builtin function.

I edited your code using import originalBody because I am not sure how the reload function works with the from x import y syntax.

Code below:

from importlib import reload

import originalBody



for i in range (0,10):

    reload(originalBody)



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = originalBody.BODY()

    print(parent.bodySegment)

answered Nov 21 '18 at 15:59

FMarazzi

328213

Thanks a lot! It helps to solve my issue. Just that reload() is for python 2. In my case for python 3.3, 'import imp imp.reload()' will do the trick

– Nadiah Naz
Nov 21 '18 at 16:49

Sorry, I should have specified the version. Anyway, reload exists since python 3.4 onwards!

– FMarazzi
Nov 21 '18 at 17:04

add a comment |

You can reload a module when it has already been imported by using the reload builtin function.

I edited your code using import originalBody because I am not sure how the reload function works with the from x import y syntax.

Code below:

from importlib import reload

import originalBody



for i in range (0,10):

    reload(originalBody)



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = originalBody.BODY()

    print(parent.bodySegment)

answered Nov 21 '18 at 15:59

FMarazzi

328213

Thanks a lot! It helps to solve my issue. Just that reload() is for python 2. In my case for python 3.3, 'import imp imp.reload()' will do the trick

– Nadiah Naz
Nov 21 '18 at 16:49

Sorry, I should have specified the version. Anyway, reload exists since python 3.4 onwards!

– FMarazzi
Nov 21 '18 at 17:04

add a comment |

You can reload a module when it has already been imported by using the reload builtin function.

I edited your code using import originalBody because I am not sure how the reload function works with the from x import y syntax.

Code below:

from importlib import reload

import originalBody



for i in range (0,10):

    reload(originalBody)



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = originalBody.BODY()

    print(parent.bodySegment)

answered Nov 21 '18 at 15:59

FMarazzi

328213

You can reload a module when it has already been imported by using the reload builtin function.

I edited your code using import originalBody because I am not sure how the reload function works with the from x import y syntax.

Code below:

from importlib import reload

import originalBody



for i in range (0,10):

    reload(originalBody)



    fileToRead = open('addBody.py')

    fileToAppend = open('originalBody.py', 'a')

    ...(add body from addBody.py to originalBody.py)...

    fileToAppend.close()

    fileToRead.close()



    parent = originalBody.BODY()

    print(parent.bodySegment)

answered Nov 21 '18 at 15:59

FMarazzi

328213

answered Nov 21 '18 at 15:59

FMarazzi

328213

answered Nov 21 '18 at 15:59

FMarazzi

328213

answered Nov 21 '18 at 15:59

FMarazzi

328213

Thanks a lot! It helps to solve my issue. Just that reload() is for python 2. In my case for python 3.3, 'import imp imp.reload()' will do the trick

– Nadiah Naz
Nov 21 '18 at 16:49

Sorry, I should have specified the version. Anyway, reload exists since python 3.4 onwards!

– FMarazzi
Nov 21 '18 at 17:04

add a comment |

Thanks a lot! It helps to solve my issue. Just that reload() is for python 2. In my case for python 3.3, 'import imp imp.reload()' will do the trick

– Nadiah Naz
Nov 21 '18 at 16:49

Sorry, I should have specified the version. Anyway, reload exists since python 3.4 onwards!

– FMarazzi
Nov 21 '18 at 17:04

Thanks a lot! It helps to solve my issue. Just that reload() is for python 2. In my case for python 3.3, 'import imp imp.reload()' will do the trick

– Nadiah Naz
Nov 21 '18 at 16:49

Sorry, I should have specified the version. Anyway, reload exists since python 3.4 onwards!

– FMarazzi
Nov 21 '18 at 17:04

add a comment |

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