Update python-pandas.qmd

Small typos in the text

Author: rdenise

python-pandas.qmd

@@ -527,7 +527,7 @@ To print a range of rows, the first and last index can be written with a `:`.
 To print the second and third row, this would be `[1:2, :]`.
 
 ```{.python eval=False}
-df.loc[1:2]
+df.loc[1:2, :]
 ```
 ::: {.callout-note collapse="true"}
 ## Expand to see output
@@ -843,7 +843,7 @@ dtype: float64
 ```
 :::
 
-There are also ceartin functions that are usfule for non-numeric columns.
+There are also certain functions that are useful for non-numeric columns.
 To know which stings are present in a `object`, the fuction `unique()` can be used, this will returns an `array` with the unique values in the column or row.
 
 ```{.python eval=False}