- small cosmetic changes

src/py.rs

@@ -27,6 +27,7 @@ use pyo3_stub_gen::{StubGenConfig, StubInfo};
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 use std::error::Error as StdError;
+use std::fmt::Debug;
 use std::path::PathBuf;
 
 fn format_error_chain(err: &crate::error::Error) -> String {

src/readers/bioformats_java.rs

@@ -470,15 +470,15 @@ impl Drop for BioFormatsJavaReader {
     }
 }
 
-fn find_tiff(path: PathBuf) -> Result<Option<PathBuf>, Error> {
+fn find_tiff(path: &Path) -> Result<Option<PathBuf>, Error> {
     if let Some(ext) = path.extension()
         && path.is_file()
         && (["tif", "tiff"].contains(&ext.to_string_lossy().to_lowercase().as_str()))
     {
-        return Ok(Some(path));
+        return Ok(Some(path.to_path_buf()));
     } else if path.is_dir() {
         for file in path.read_dir()?.flatten().sorted_by_key(|i| i.file_name()) {
-            if let Ok(Some(file)) = find_tiff(file.path()) {
+            if let Ok(Some(file)) = find_tiff(file.path().as_path()) {
                 return Ok(Some(file));
             }
         }
@@ -495,7 +495,7 @@ impl Reader for BioFormatsJavaReader {
         let mut path = path.as_ref().to_path_buf();
         if path.is_dir() {
             let orig = path.clone();
-            path = find_tiff(path)?.ok_or_else(|| {
+            path = find_tiff(&path)?.ok_or_else(|| {
                 Error::FileDoesNotExist(orig.join("**").join("*.tif").display().to_string())
             })?;
         }
@@ -572,7 +572,7 @@ impl Reader for BioFormatsJavaReader {
         let mut path = path.as_ref().to_path_buf();
         if path.is_dir() {
             let orig = path.clone();
-            path = find_tiff(path)?.ok_or_else(|| {
+            path = find_tiff(&path)?.ok_or_else(|| {
                 Error::FileDoesNotExist(orig.join("**").join("*.tif").display().to_string())
             })?;
         }

src/readers/czi.rs

@@ -795,7 +795,7 @@ impl Reader for CziReader {
                                 .get_child("Wavelength")
                                 .and_then(|w| w.get_text())
                                 .and_then(|t| t.parse().ok())
-                                .and_then(|w| if w > 0.0 { Some(w) } else { None }),
+                                .filter(|&w| w > 0.0),
                             wavelength_unit: ome::UnitsLength::nm,
                         })
                 } else if let Version::Other = version {
@@ -876,7 +876,7 @@ impl Reader for CziReader {
                         .get_child("EmissionWaveLength")
                         .and_then(|e| e.get_text())
                         .and_then(|t| t.parse().ok())
-                        .and_then(|w| if w > 0.0 { Some(w) } else { None }),
+                        .filter(|&w| w > 0.0),
                     emission_wavelength_unit: ome::UnitsLength::nm,
                     excitation_wavelength: light_source_settings
                         .as_ref()