fix subject f string

streamlit-venv/lib/python3.10/site-packages/streamlit/vendor/ipython/modified_sys_path.py

@@ -0,0 +1,67 @@
+# BSD 3-Clause License
+#
+# - Copyright (c) 2008-Present, IPython Development Team
+# - Copyright (c) 2001-2007, Fernando Perez <fernando.perez@colorado.edu>
+# - Copyright (c) 2001, Janko Hauser <jhauser@zscout.de>
+# - Copyright (c) 2001, Nathaniel Gray <n8gray@caltech.edu>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+
+# * Neither the name of the copyright holder nor the names of its
+#   contributors may be used to endorse or promote products derived from
+#   this software without specific prior written permission.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Code modified from IPython (BSD license)
+# Source: https://github.com/ipython/ipython/blob/master/IPython/utils/syspathcontext.py#L42
+
+import sys
+
+from streamlit import util
+
+
+class modified_sys_path:
+    """A context for prepending a directory to sys.path for a second."""
+
+    def __init__(self, main_script_path: str):
+        self._main_script_path = main_script_path
+        self._added_path = False
+
+    def __repr__(self) -> str:
+        return util.repr_(self)
+
+    def __enter__(self):
+        if self._main_script_path not in sys.path:
+            sys.path.insert(0, self._main_script_path)
+            self._added_path = True
+
+    def __exit__(self, type, value, traceback):
+        if self._added_path:
+            try:
+                sys.path.remove(self._main_script_path)
+            except ValueError:
+                # It's already removed.
+                pass
+
+        # Returning False causes any exceptions to be re-raised.
+        return False