Importing modules does not work

$ tree      
.
├── a
│   ├── __init__.py
│   └── b.py
└── r.py

1 directory, 3 files
$ cat a/b.py 
def f():
    print("b.f() called")
$ cat r.py 
from a.b import f
f()

This gives:

$ lpython r.py 
semantic error: Could not find the module '__init__.py'. If an import path is available, please use the `-I` option to specify it
 --> r.py:1:1
  |
1 | from a.b import f
  | ^^^^^^^^^^^^^^^^^ 


Note: if any of the above error or warning messages are not clear or are lacking
context please report it to us (we consider that a bug that needs to be fixed).
$ lpython -I . r.py
semantic error: Could not find the module '__init__.py'. If an import path is available, please use the `-I` option to specify it
 --> r.py:1:1
  |
1 | from a.b import f
  | ^^^^^^^^^^^^^^^^^ 


Note: if any of the above error or warning messages are not clear or are lacking
context please report it to us (we consider that a bug that needs to be fixed).

@Thirumalai-Shaktivel

@Thirumalai-Shaktivel any idea why this does not work?

Currently, we don't support

from a.b import f

Instead, this works:

from a import f

$ lpython r.py
b.f() called

I will try to work on this soon.

Fixed here: #1306

Ok, the above now works with #1306, but more deeply nested doesn't:

$ tree a
a
├── __init__.py
├── b.py
└── c
    ├── __init__.py
    └── d.py
(lf) repos/lpython(nested_modules_02) $ cat a/c/d.py 
def g():
    print("a.c.g() called")
(lf) repos/lpython(nested_modules_02) $ cat r.py 
from a.b import f
f()
from a.c.d import g
g()
(lf) repos/lpython(nested_modules_02) $ python r.py 
b.f() called
a.c.g() called
(lf) repos/lpython(nested_modules_02) $ lpython r.py
semantic error: Could not find the module 'a/c.d.py'. If an import path is available, please use the `-I` option to specify it
 --> r.py:3:1
  |
3 | from a.c.d import g
  | ^^^^^^^^^^^^^^^^^^^ 


Note: if any of the above error or warning messages are not clear or are lacking
context please report it to us (we consider that a bug that needs to be fixed).

Fixed here: #1315

@Thirumalai-Shaktivel

I think it works now!

I can't think of any case that doesn't work, so I am going to close this issue as fixed. If we discover more things that don't work, I'll open a new issue.

@Thirumalai-Shaktivel, @czgdp1807 are we ready now to start making Python packages that compile with LPython?

I came across another issue that doesn't work yet. Like for this example:

import test_import

def test():
    print(test_import.print_a())
    print(test_import.print_b())
    print(test_import.print_c())

test()

Error:

lpython integration_tests/test_import_01.py
Internal Compiler Error: Unhandled exception
Traceback (most recent call last):
  Binary file "/home/thirumalai/Open_Source/lpython/src/bin/lpython", in _start()
  File "./csu/../csu/libc-start.c", line 392, in __libc_start_main_impl()
  File "./csu/../sysdeps/nptl/libc_start_call_main.h", line 58, in __libc_start_call_main()
  File "/home/thirumalai/Open_Source/lpython/src/bin/lpython.cpp", line 1545, in ??
    err = compile_python_to_object_file(arg_file, tmp_o, runtime_library_dir, lpython_pass_manager, compiler_options, time_report);
  File "/home/thirumalai/Open_Source/lpython/src/bin/lpython.cpp", line 592, in ??
    !(arg_c && compiler_options.disable_main), infile);
AssertFailed: asr_verify(*tu, true, diagnostics)

I will try to work on this later this week. After that, I think we are ready to start making python packages.

Can you open up a dedicated issue for this and close this issue?

@Thirumalai-Shaktivel

@Thirumalai-Shaktivel, @czgdp1807 are we ready now to start making Python packages that compile with LPython?

At least I will start writing code in a modular way and compile it using LPython. Probably by the end of this week or early next week.

Yup, that would be very helpful. That way, we can test and report any bugs.

I referenced this as a new issue.

Thanks!

#1317

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Importing modules does not work #1305

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Importing modules does not work #1305

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certik commented on Nov 16, 2022

Thirumalai-Shaktivel commented on Nov 17, 2022

Thirumalai-Shaktivel commented on Nov 18, 2022

certik commented on Nov 18, 2022

Thirumalai-Shaktivel commented on Nov 19, 2022

certik commented on Nov 20, 2022

Thirumalai-Shaktivel commented on Nov 21, 2022

certik commented on Nov 21, 2022

czgdp1807 commented on Nov 21, 2022

Thirumalai-Shaktivel commented on Nov 21, 2022

Thirumalai-Shaktivel commented on Nov 21, 2022

certik commented on Nov 21, 2022

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