fix: error handle in initial configuration (#89)

When post installation script is triggered during installation,
the initialization check file (init.txt) is not present, which raises
an exception. This leads to the failed installation. The issue is fixed
by catching the error and suppressing it (which is okay because it is
only happening during the installation).

Author: myungjin

README.md

@@ -42,8 +42,6 @@ The framework is built on top of PyTorch, a widely-used deep learning framework,
 
 ## Installation
 
-### Step 1: Install multiworld package
-
 To use the latest official package,
 
 ```bash
@@ -56,12 +54,6 @@ To install the package from source,
 pip install .
 ```
 
-### Step 2: Run post installation script
-
-```bash
-m8d-post-setup
-```
-
 ## Running Examples
 
 The list of all examples that are available can be found in the [`examples`](/examples) folder.

multiworld/post_setup.py

@@ -22,13 +22,21 @@
 
 
 def configure_once():
+    """Configure multiworld once when it is used for the first time."""
     package_name = __name__.split(".")[0]
     path_to_sitepackages = site.getsitepackages()[0]
 
     init_file_path = os.path.join(path_to_sitepackages, package_name, "init.txt")
 
-    with open(init_file_path, "r") as file:
-        patch_applied = file.read()
+    try:
+        with open(init_file_path, "r") as file:
+            patch_applied = file.read()
+    except FileNotFoundError:
+        message = "WARNING: initialization check file not found; "
+        message += f"{package_name} is not installed correctly; "
+        message += "please reinstall."
+        print(message)
+        return
 
     if patch_applied == "true":
         return