remove PEP498 f-string new feature for support python3.5 (#4250)

nnvm/tests/python/frontend/tensorflow/test_forward.py

@@ -537,7 +537,7 @@ def _test_split(in_shape, axis, num_or_size_splits, dtype):
     num_split = len(num_or_size_splits) if isinstance(num_or_size_splits, list) else num_or_size_splits
     tf.split(in_data, num_or_size_splits, axis=axis)
 
-    compare_tf_with_tvm([np_data], ['in_data:0'], [f'split:{n}' for n in range(num_split)])
+    compare_tf_with_tvm([np_data], ['in_data:0'], ['split:{0}'.format(n) for n in range(num_split)])
 
     # and now test together with concat
     tf.reset_default_graph()
@@ -586,7 +586,7 @@ def _test_unstack(ip_shape, axis, dtype):
     in_data = tf.placeholder(dtype, ip_shape, name="in_data")
     tf.unstack(in_data, axis=axis)
 
-    compare_tf_with_tvm([np_data], ['in_data:0'], [f'unstack:{n}' for n in range(ip_shape[axis])])
+    compare_tf_with_tvm([np_data], ['in_data:0'], ['unstack:{0}'.format(n) for n in range(ip_shape[axis])])
 
     tf.reset_default_graph()
     in_data = tf.placeholder(dtype, ip_shape, name="in_data")

python/tvm/relay/_parser.py

@@ -215,7 +215,7 @@ class ParseTreeToRelayIR(RelayVisitor):
     def mk_global_var(self, name: str) -> expr.GlobalVar:
         """Create a new GlobalVar and add it to the GlobalVar scope."""
         if name in self.global_vars:
-            raise ParseError(f"duplicate global var \"{name}\"")
+            raise ParseError("duplicate global var \"{0}\"".format(name))
         var = expr.GlobalVar(name)
         self.global_vars[name] = var
         return var
@@ -252,14 +252,15 @@ class ParseTreeToRelayIR(RelayVisitor):
             new_typ_name = self._type_expr_name(new_expr)
             existing_typ_name = self._type_expr_name(self.global_type_vars[name])
             raise ParseError(
-                f"{new_typ_name} `{name}` conflicts with existing {existing_typ_name}")
+                "{0} `{1}` conflicts with existing {2}".format(new_typ_name,\
+                                                                name, existing_typ_name))
 
     def _type_expr_name(self, e):
         if isinstance(e, adt.Constructor):
-            return f"`{e.belong_to.var.name}` ADT constructor"
+            return "`{0}` ADT constructor".format(e.belong_to.var.name)
         elif isinstance(e, ty.GlobalTypeVar):
             if e.kind == ty.Kind.AdtHandle:
-                return f"ADT definition"
+                return "ADT definition"
         return "function definition"
 
     def visitProjection(self, ctx):
@@ -282,7 +283,7 @@ class ParseTreeToRelayIR(RelayVisitor):
             raise ParseError("unrecognized BOOL_LIT: `{}`".format(node_text))
         if node_type == RelayLexer.QUOTED_STRING:
             return literal_eval(node_text)
-        raise ParseError(f"unhandled terminal \"{node_text}\" of type `{node_type}`")
+        raise ParseError("unhandled terminal \"{0}\" of type `{1}`".format(node_text, node_type))
 
     def visitGeneralIdent(self, ctx):
         name = ctx.getText()
@@ -310,14 +311,14 @@ class ParseTreeToRelayIR(RelayVisitor):
         var_name = ctx.CNAME().getText()
         global_var = self.global_vars.get(var_name, None)
         if global_var is None:
-            raise ParseError(f"unbound global var `{var_name}`")
+            raise ParseError("unbound global var `{0}`".format(var_name))
         return global_var
 
     def visitLocalVar(self, ctx):
         var_name = ctx.CNAME().getText()
         local_var = lookup(self.var_scopes, var_name)
         if local_var is None:
-            raise ParseError(f"unbound local var `{var_name}`")
+            raise ParseError("unbound local var `{0}`".format(var_name))
         return local_var
 
     def visitGraphVar(self, ctx):
@@ -557,7 +558,7 @@ class ParseTreeToRelayIR(RelayVisitor):
         elif match_type == "match?":
             complete_match = False
         else:
-            raise RuntimeError(f"unknown match type {match_type}")
+            raise RuntimeError("unknown match type {0}".format(match_type))
 
         match_data = self.visit(ctx.expr())
         match_clauses = ctx.matchClauseList()

python/tvm/relay/memory_alloc.py

@@ -50,7 +50,7 @@ class LinearizeRetType:
                 for field_ty in typ.fields:
                     _unpack(field_ty, out)
             else:
-                raise Exception(f"unsupported Relay type: {typ}")
+                raise Exception("unsupported Relay type: {0}".format(typ))
 
         output = []
         _unpack(self.typ, output)
@@ -67,7 +67,7 @@ class LinearizeRetType:
                     _pack(value[i], field_ty, tuple_out)
                 out.append(expr.Tuple(tuple_out))
             else:
-                raise Exception(f"unsupported Relay type: {typ}")
+                raise Exception("unsupported Relay type: {0}".format(typ))
 
         if len(seq) == 1:
             return seq[0]
@@ -144,11 +144,11 @@ class ManifestAllocPass(ExprMutator):
         size = self.compute_storage(tensor_type)
         alignment = self.compute_alignment(tensor_type.dtype)
         dtype = tensor_type.dtype
-        sto = scope.let(f"storage_{i}", self.alloc_storage(
+        sto = scope.let("storage_{0}".format(i), self.alloc_storage(
             size, alignment, dtype))
         # TODO(@jroesch): There is a bug with typing based on the constant shape.
         tensor = self.alloc_tensor(sto, shape, dtype, tensor_type.shape)
-        return scope.let(f"tensor_{i}", tensor)
+        return scope.let("tensor_{0}".format(i), tensor)
 
     def visit_let(self, let):
         scope = ScopeBuilder()
@@ -192,13 +192,13 @@ class ManifestAllocPass(ExprMutator):
                     if state == 2:
                         sh_of = self.visit(self.shape_of(arg))
                         shape_func_ins.append(
-                            scope.let(f"in_shape_{i}", sh_of))
+                            scope.let("in_shape_{0}".format(i), sh_of))
                         is_inputs.append(0)
                     # Pass Inputs
                     elif state == 1:
                         new_arg = self.visit(arg)
                         shape_func_ins.append(
-                            scope.let(f"in_shape_{i}", new_arg))
+                            scope.let("in_shape_{0}".format(i), new_arg))
                         is_inputs.append(1)
                     # TODO(@jroesch): handle 3rd case
                     else:
@@ -208,7 +208,7 @@ class ManifestAllocPass(ExprMutator):
                 for i, out in enumerate(cfunc.outputs):
                     tt = ty.TensorType(out.shape, out.dtype)
                     alloc = self.make_static_allocation(scope, tt, i)
-                    alloc = scope.let(f"shape_func_out_{i}", alloc)
+                    alloc = scope.let("shape_func_out_{0}".format(i), alloc)
                     out_shapes.append(alloc)
 
                 shape_call = self.shape_func(
@@ -226,7 +226,7 @@ class ManifestAllocPass(ExprMutator):
                     size = self.compute_storage_in_relay(
                         out_shape, out_type.dtype)
                     alignment = self.compute_alignment(out_type.dtype)
-                    sto = scope.let(f"storage_{i}", self.alloc_storage(
+                    sto = scope.let("storage_{i}".format(i=i), self.alloc_storage(
                         size, alignment, out_type.dtype))
                     storages.append(sto)
 
@@ -238,7 +238,7 @@ class ManifestAllocPass(ExprMutator):
                         out_shape,
                         out_type.dtype,
                         out_type.shape)
-                    alloc = scope.let(f"out_{i}", alloc)
+                    alloc = scope.let("out_{i}".format(i=i), alloc)
                     outs.append(alloc)
 
                 invoke = self.invoke_tvm(call.op, ins, expr.Tuple(outs))

rust/frontend/README.md

@@ -128,7 +128,7 @@ from tvm.contrib import cc
 
 def test_add(target_dir):
     if not tvm.module.enabled("cuda"):
-        print(f"skip {__file__} because cuda is not enabled...")
+        print("skip {__file__} because cuda is not enabled...".format(__file__=__file__))
         return
     n = tvm.var("n")
     A = tvm.placeholder((n,), name='A')