Better sampling and relax dependency (#2082)

Author: Zenglinxiao

.github/workflows/push.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install --upgrade setuptools==50.3.0
+        pip install --upgrade setuptools
         pip install -e .
         pip install -r requirements.opt.txt
         pip install flake8

onmt/translate/greedy_search.py

@@ -83,9 +83,8 @@ def sample_with_temperature(logits, sampling_temp, keep_topk, keep_topp):
             logits = sample_topp(logits, keep_topp)
         if keep_topk > 0:
             logits = sample_topk(logits, keep_topk)
-        dist = torch.distributions.Multinomial(
-            logits=logits, total_count=1)
-        topk_ids = torch.argmax(dist.sample(), dim=1, keepdim=True)
+        dist = torch.distributions.Categorical(logits=logits)
+        topk_ids = dist.sample().view(-1, 1)
         topk_scores = logits.gather(dim=1, index=topk_ids)
     return topk_ids, topk_scores
 

requirements.opt.txt

@@ -1,8 +1,4 @@
-cffi==1.14.3
-joblib==0.17.0
-numba==0.43.0
-llvmlite==0.32.1
-pyrouge==0.1.3
+pyrouge
 git+git://github.com/NVIDIA/apex.git@700d6825e205732c1d6be511306ca4e595297070
-sentencepiece==0.1.94
-subword-nmt==0.3.7
+sentencepiece>=0.1.94
+subword-nmt>=0.3.7

setup.py

@@ -21,15 +21,14 @@
     },
     python_requires=">=3.5",
     install_requires=[
-        "tqdm>=4.51,<5",
-        "torch==1.6.0",
+        "torch>=1.6.0",
         "torchtext==0.5.0",
-        "configargparse>=1.2.3,<2",
-        "tensorboard>=2.3,<3",
-        "flask==1.1.2",
-        "waitress==1.4.4",
+        "configargparse",
+        "tensorboard>=2.3",
+        "flask",
+        "waitress",
         "pyonmttok>=1.23,<2;platform_system=='Linux' or platform_system=='Darwin'",
-        "pyyaml==5.4",
+        "pyyaml",
     ],
     entry_points={
         "console_scripts": [