Merge pull request #9594 from hexagonrecursion/fstring

Author: uranusjr

src/pip/_internal/network/utils.py

@@ -42,12 +42,12 @@ def raise_for_status(resp):
         reason = resp.reason
 
     if 400 <= resp.status_code < 500:
-        http_error_msg = '%s Client Error: %s for url: %s' % (
-            resp.status_code, reason, resp.url)
+        http_error_msg = (
+            f'{resp.status_code} Client Error: {reason} for url: {resp.url}')
 
     elif 500 <= resp.status_code < 600:
-        http_error_msg = '%s Server Error: %s for url: %s' % (
-            resp.status_code, reason, resp.url)
+        http_error_msg = (
+            f'{resp.status_code} Server Error: {reason} for url: {resp.url}')
 
     if http_error_msg:
         raise NetworkConnectionError(http_error_msg, response=resp)

src/pip/_internal/resolution/resolvelib/requirements.py

@@ -166,7 +166,7 @@ def __init__(self, name):
 
     def __str__(self):
         # type: () -> str
-        return "{} (unavailable)".format(self._name)
+        return f"{self._name} (unavailable)"
 
     def __repr__(self):
         # type: () -> str

src/pip/_internal/utils/misc.py

@@ -241,7 +241,7 @@ def strtobool(val):
     elif val in ("n", "no", "f", "false", "off", "0"):
         return 0
     else:
-        raise ValueError("invalid truth value %r" % (val,))
+        raise ValueError(f"invalid truth value {val!r}")
 
 
 def format_size(bytes):

src/pip/_internal/wheel_builder.py

@@ -187,7 +187,7 @@ def _verify_one(req, wheel_path):
     try:
         metadata_version = Version(metadata_version_value)
     except InvalidVersion:
-        msg = "Invalid Metadata-Version: {}".format(metadata_version_value)
+        msg = f"Invalid Metadata-Version: {metadata_version_value}"
         raise UnsupportedWheel(msg)
     if (metadata_version >= Version("1.2")
             and not isinstance(dist.version, Version)):