type signatures

Author: MarcoGorelli

pandas/core/frame.py

@@ -2226,7 +2226,12 @@ def to_html(
     # ----------------------------------------------------------------------
     @Appender(info.__doc__)
     def info(
-        self, verbose=None, buf=None, max_cols=None, memory_usage=None, null_counts=None
+        self,
+        verbose: Optional[bool] = None,
+        buf: Optional[IO[str]] = None,
+        max_cols: Optional[int] = None,
+        memory_usage: Optional[Union[bool, str]] = None,
+        null_counts: Optional[bool] = None,
     ) -> None:
         return info(self, verbose, buf, max_cols, memory_usage, null_counts)
 

pandas/io/formats/info.py

@@ -1,17 +1,26 @@
 import sys
+from typing import IO, TYPE_CHECKING, Optional, Union
 
 from pandas._config import get_option
 
 from pandas.io.formats import format as fmt
 from pandas.io.formats.printing import pprint_thing
 
+if TYPE_CHECKING:
+    from pandas.core.generic import NDFrame
+
 
 def _put_str(s, space):
     return str(s)[:space].ljust(space)
 
 
 def info(
-    data, verbose=None, buf=None, max_cols=None, memory_usage=None, null_counts=None
+    data: NDFrame,
+    verbose: Optional[bool] = None,
+    buf: Optional[IO[str]] = None,
+    max_cols: Optional[int] = None,
+    memory_usage: Optional[Union[bool, str]] = None,
+    null_counts: Optional[bool] = None,
 ) -> None:
     """
     Print a concise summary of a DataFrame.