Fix reading in coefficient files

Author: tobiasmarke

mwrpy/level2/get_ret_coeff.py

@@ -31,7 +31,7 @@ def get_mvr_coeff(
     c_list = get_coeff_list(site, prefix, coeff_files)
 
     coeff: dict = {}
-    if len(c_list) != 1:
+    if len(c_list) == 0:
         return coeff
 
     if (str(c_list[0][-3:]).lower() == "ret") and (len(c_list) == 1):

mwrpy/utils.py

@@ -279,8 +279,8 @@ def get_coeff_list(
     site: str | None, prefix: str, coeff_files: Sequence[str | PathLike] | None
 ) -> list[str]:
     """Returns list of .ret or .nc coefficient file(s)."""
+    c_list = []
     if coeff_files is not None:
-        c_list = []
         for file in coeff_files:
             basename = os.path.basename(file)
             if f"{prefix.lower()}_" in basename.lower():
@@ -291,27 +291,28 @@ def get_coeff_list(
     assert isinstance(site, str)
     dir_path = os.path.dirname(os.path.realpath(__file__))
     for suf in (".nc", ".ret"):
-        c_list = glob.glob(
-            dir_path
-            + "/site_config/"
-            + site
-            + "/coefficients/"
-            + "*"
-            + prefix.lower()
-            + "*"
-            + suf
-        )
         if len(c_list) == 0:
             c_list = glob.glob(
                 dir_path
                 + "/site_config/"
                 + site
                 + "/coefficients/"
                 + "*"
-                + prefix.upper()
+                + prefix.lower()
                 + "*"
                 + suf
             )
+            if len(c_list) == 0:
+                c_list = glob.glob(
+                    dir_path
+                    + "/site_config/"
+                    + site
+                    + "/coefficients/"
+                    + "*"
+                    + prefix.upper()
+                    + "*"
+                    + suf
+                )
 
     if len(c_list) > 0:
         return sorted(c_list)