Merge pull request #241 from littletomatodonkey/update_faq

fix visualdl version bug

docs/en/faq_en.md

@@ -46,3 +46,8 @@ VALID:
 >>
 * Q: What should I do if I want to transform the weights' format from `pdparams` to an earlier version(before Paddle1.7.0), which consists of the scattered files?
 * A: You can use `fluid.load` to load the `pdparams` weights and use `fluid.io.save_vars` to save the weights as scattered files.
+
+
+>>
+* Q: The error occured when using visualdl under python2, shows that: `TypeError: __init__() missing 1 required positional argument: 'sync_cycle'`.
+* A: `Visualdl` is only supported on python3 as now, whose version needs also be higher than `2.0`. If your visualdl version is lower than 2.0, you can also install visualdl 2.0 by `pip3 install visualdl==2.0.0b8 -i https://mirror.baidu.com/pypi/simple`.

docs/zh_CN/faq.md

@@ -46,3 +46,8 @@ VALID:
 >>
 * Q: 如果想将保存的`pdparams`模型参数文件转换为早期版本(Paddle1.7.0之前)的零碎文件(每个文件均为一个单独的模型参数)，该怎么实现呢？
 * A: 可以首先导入`pdparams`模型，之后使用`fluid.io.save_vars`函数将模型保存为零散的碎文件。
+
+
+>>
+* Q: python2下，使用visualdl的时候，报出以下错误，`TypeError: __init__() missing 1 required positional argument: 'sync_cycle'`，这是为什么呢？
+* A: 目前visualdl仅支持在python3下运行，visualdl需要是2.0以上的版本，如果visualdl版本不对的话，可以通过以下方式进行安装：`pip3 install visualdl==2.0.0b8  -i https://mirror.baidu.com/pypi/simple`cd

tools/train.py

@@ -18,6 +18,7 @@ from __future__ import print_function
 
 import argparse
 import os
+from sys import version_info
 
 import paddle.fluid as fluid
 from paddle.fluid.incubate.fleet.base import role_maker
@@ -101,11 +102,15 @@ def main(args):
 
     compiled_train_prog = fleet.main_program
 
+    vdl_writer = None
     if args.vdl_dir:
+        if version_info.major == 2:
+            logger.info(
+                "visualdl is just supported for python3, so it is disabled in python2..."
+            )
+        else:
             from visualdl import LogWriter
             vdl_writer = LogWriter(args.vdl_dir)
-    else:
-        vdl_writer = None
 
     for epoch_id in range(config.epochs):
         # 1. train with train dataset

tools/train_multi_platform.py

@@ -18,6 +18,7 @@ from __future__ import print_function
 
 import argparse
 import os
+from sys import version_info
 
 import paddle.fluid as fluid
 
@@ -110,11 +111,15 @@ def main(args):
         compiled_valid_prog = program.compile(
             config, valid_prog, share_prog=compiled_train_prog)
 
+    vdl_writer = None
     if args.vdl_dir:
+        if version_info.major == 2:
+            logger.info(
+                "visualdl is just supported for python3, so it is disabled in python2..."
+            )
+        else:
             from visualdl import LogWriter
             vdl_writer = LogWriter(args.vdl_dir)
-    else:
-        vdl_writer = None
 
     for epoch_id in range(config.epochs):
         # 1. train with train dataset