support Python 3.7

1 files changed, 5 insertions, 2 deletions

diff --git a/bin/nvm b/bin/nvm
index c4c0a10..50b9138 100755
--- a/bin/nvm
+++ b/bin/nvm
@@ -95,14 +95,17 @@ class Line:
         if self.product.startswith("national"):
             self.css_class = "longdistance"
         elif self.product == "tram":
-            self.name = self.name.removeprefix("STR ")
+            # str.removeprefix requires Python ≥ 3.9
+            if self.name.startswith("STR "):
+                self.name = self.name[4:]
             self.css_class = "tram"
         elif self.product == "suburban":
             self.css_class = "suburban"
         elif self.product == "subway":
             self.css_class = "subway"
         elif self.product == "bus":
-            self.name = self.name.removeprefix("Bus ")
+            if self.name.startswith("Bus "):
+                self.name = self.name[4:]
             self.css_class = "bus"