diff --git a/.gitignore b/.gitignore
index a16f3cb..b500b47 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,4 +108,6 @@ demo/log
 
 # test cache data
 test/.test_cache_data/*
-test/.test_cache_data
\ No newline at end of file
+test/.test_cache_data
+
+.idea
\ No newline at end of file
diff --git a/README.md b/README.md
deleted file mode 100644
index d8aecfe..0000000
--- a/README.md
+++ /dev/null
@@ -1,24 +0,0 @@
-![build](https://api.travis-ci.org/chinapnr/fishbase.svg?branch=master)
-![doc](https://readthedocs.org/projects/fishbase/badge/?version=latest)
-[![Coverage Status](https://coveralls.io/repos/github/chinapnr/fishbase/badge.svg?branch=master)](https://coveralls.io/github/chinapnr/fishbase?branch=master)
-
-## fishbase 简介
-
-fishbase 是我们自己开发和整理的一套 Python 基础函数库。 从这几年的 Python 开发中抽象了很多常见的通用的业务逻辑，以希望减少日常开发中的一些重复的工作量。
-
-我们从2016年左右逐渐开始用 Python 开发一些项目，还不能算很有经验，但是也经常碰到一些问题， fishbase 库并不是用来解决很复杂的问题，并且有些是对系统函数的进一步封装，以简化应用程序开发中的工作量和引用的复杂度。
-
-目前，我们正在加快 fishbase 库的建设，包括完善文档和加入单元测试、示例代码、文档等。希望能够帮助到所有的 Python 爱好者和应用开发人员。
-
----
-
-目前主要分为：
-
-* fish_common 基本函数包
-* fish_system 系统增强函数包
-* fish_file 文件处理增强函数包
-* fish_csv csv 处理增强函数包
-* fish_logger 日志记录增强函数包
-* fish_project project 目录结构生成函数包
-
-详细帮助文档：http://fishbase.readthedocs.io/
\ No newline at end of file
diff --git a/README.rst b/README.rst
new file mode 100644
index 0000000..f0fc77d
--- /dev/null
+++ b/README.rst
@@ -0,0 +1,44 @@
+
+.. image:: https://travis-ci.org/chinapnr/fishbase.svg?branch=master
+    :target: https://travis-ci.org/chinapnr/fishbase
+.. image:: https://coveralls.io/repos/github/chinapnr/fishbase/badge.svg?branch=master
+    :target: https://coveralls.io/github/chinapnr/fishbase?branch=master
+.. image:: https://readthedocs.org/projects/fishbase/badge/?version=latest
+    :target: https://fishbase.readthedocs.io/en/latest/?badge=latest
+
+
+
+.. _header-n22:
+
+fishbase 简介
+=============
+
+fishbase 是我们自己开发和整理的一套 Python 基础函数库。 从这几年的
+Python
+开发中抽象了很多常见的通用的业务逻辑，以希望减少日常开发中的一些重复的工作量。
+
+我们从2016年左右逐渐开始用 Python
+开发一些项目，还不能算很有经验，但是也经常碰到一些问题， fishbase
+库并不是用来解决很复杂的问题，并且有些是对系统函数的进一步封装，以简化应用程序开发中的工作量和引用的复杂度。
+
+目前，我们正在加快 fishbase
+库的建设，包括完善文档和加入单元测试、示例代码、文档等。希望能够帮助到所有的
+Python 爱好者和应用开发人员。
+
+--------------
+
+目前主要分为：
+
+-  fish_common 基本函数包
+
+-  fish_system 系统增强函数包
+
+-  fish_file 文件处理增强函数包
+
+-  fish_csv csv 处理增强函数包
+
+-  fish_logger 日志记录增强函数包
+
+-  fish_project project 目录结构生成函数包
+
+详细帮助文档：http://fishbase.readthedocs.io/
diff --git a/docs/change_log.rst b/docs/change_log.rst
index 7afe7ee..dda6eea 100644
--- a/docs/change_log.rst
+++ b/docs/change_log.rst
@@ -1,5 +1,12 @@
 更新记录
 ===========================
+2018.9.23 v1.1.1
+---------------------------
+* `#115 <https://github.com/chinapnr/fishbase/issues/115>`_, common, :meth:`fish_common.get_random_str`, optimize;
+* `#114 <https://github.com/chinapnr/fishbase/issues/114>`_, common, add function :meth:`fish_common.transform_hump_to_underline`, doc and unittest;
+* `#101 <https://github.com/chinapnr/fishbase/issues/101>`_, date, add function :meth:`fish_date.transform_datetime_to_unix`, doc and unittest;
+
+
 2018.9.3 v1.1.0
 ---------------------------
 * `#74 <https://github.com/chinapnr/fishbase/issues/74>`_, common, add function :meth:`fish_common.get_group_list_data`, doc and unittest;
@@ -9,11 +16,10 @@
 * `#82 <https://github.com/chinapnr/fishbase/issues/82>`_, project, add function :meth:`fish_project.init_project_by_yml`, doc and unittest;
 
 
-
 2018.8.2 v1.0.16
 ---------------------------
 * `#87 <https://github.com/chinapnr/fishbase/issues/87>`_, date, add function :meth:`fish_date.GetRandomTime`, doc and unittest;
-* `#94 <https://github.com/chinapnr/fishbase/issues/94>`_, date, edit function :meth:`fish_csv.csv_file_to_list`, doc and unittest;
+* `#94 <https://github.com/chinapnr/fishbase/issues/94>`_, csv, edit function :meth:`fish_csv.csv_file_to_list`, doc and unittest;
 * `#94 <https://github.com/chinapnr/fishbase/issues/94>`_, common, edit function :meth:`fish_common.conf_as_dict`, doc and unittest;
 
 
diff --git a/docs/conf.py b/docs/conf.py
index 0e44624..83d544d 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -57,9 +57,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '1.1.0'
+version = '1.1.1'
 # The full version, including alpha/beta/rc tags.
-release = '1.1.0'
+release = '1.1.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/fish_common.rst b/docs/fish_common.rst
index 0f0cde2..fc5606e 100644
--- a/docs/fish_common.rst
+++ b/docs/fish_common.rst
@@ -24,6 +24,7 @@
     fish_common.get_query_param_from_url
     fish_common.get_sub_dict
     fish_common.get_group_list_data
+    fish_common.transform_hump_to_underline
 
 .. automodule:: fish_common
     :members:
diff --git a/docs/fish_date.rst b/docs/fish_date.rst
index 9a37861..8286608 100644
--- a/docs/fish_date.rst
+++ b/docs/fish_date.rst
@@ -7,6 +7,7 @@
     fish_date.GetRandomTime
     fish_date.get_time_interval
     fish_date.transform_unix_to_datetime
+    fish_date.transform_datetime_to_unix
 
 .. automodule:: fish_date
     :members:
diff --git a/fishbase/__init__.py b/fishbase/__init__.py
index b79673b..e203445 100644
--- a/fishbase/__init__.py
+++ b/fishbase/__init__.py
@@ -24,5 +24,5 @@
 from .fish_system import *
 from .fish_project import *
 
-__version__ = '1.1.0'  # type: str
+__version__ = '1.1.1'  # type: str
 
diff --git a/fishbase/fish_common.py b/fishbase/fish_common.py
index cb7787d..500fc38 100644
--- a/fishbase/fish_common.py
+++ b/fishbase/fish_common.py
@@ -12,6 +12,7 @@
 # 2017.1.8 v1.0.9 #19003, remove file related functions to fish_file.py
 import sys
 import uuid
+import copy
 import re
 import hashlib
 import hmac
@@ -748,6 +749,7 @@ def decode(s):
 
 
 # v1.0.14 edit by Hu Jun, #51
+# v1.1.1 edit by Hu Jun, #115
 def get_random_str(length, letters=True, digits=False, punctuation=False):
     """
     获得指定长度，不同规则的随机字符串，可以包含数字，字母和标点符号
@@ -787,6 +789,10 @@ def get_random_str(length, letters=True, digits=False, punctuation=False):
     random_source += string.digits if digits else ''
     random_source += string.punctuation if punctuation else ''
 
+    # 避免出现 ValueError: Sample larger than population or is negative
+    if length > len(random_source):
+        random_source *= (length//len(random_source) + 1)
+
     random_str = ''.join(random.sample(random_source, length))
     return random_str
 
@@ -1002,3 +1008,40 @@ def get_sub_dict(data_dict, key_list, default_value='default_value'):
     for item in key_list:
         sub_dict.update({item: data_dict.get(item, default_value)})
     return sub_dict
+
+
+# v1.1.1 edit by Hu Jun, #114
+def transform_hump_to_underline(param_dict):
+    """
+    将驼峰命名的参数字典键转换为下划线参数
+
+    :param:
+        * param_dict(dict): 请求参数字典
+
+    :return:
+        * temp_dict(dict): 转换后的参数字典
+
+    举例如下::
+
+        print('--- transform_hump_to_underline demo---')
+        hump_param_dict = {'firstName': 'Python', 'Second_Name': 'san', 'right_name': 'name'}
+        underline_param_dict = transform_hump_to_underline(hump_param_dict )
+        print(underline_param_dict )
+        print('---')
+
+    执行结果::
+
+        --- transform_hump_to_underline demo---
+        {'first_name': 'Python', 'second_name': 'san', 'right_name': 'name'}
+        ---
+
+    """
+    temp_dict = copy.deepcopy(param_dict)
+
+    # 正则
+    hump_to_underline = re.compile(r'([a-z]|\d)([A-Z])')
+    for key in list(param_dict.keys()):
+        # 将驼峰值替换为下划线
+        underline_sub = re.sub(hump_to_underline, r'\1_\2', key).lower()
+        temp_dict[underline_sub] = temp_dict.pop(key)
+    return temp_dict
diff --git a/fishbase/fish_date.py b/fishbase/fish_date.py
index d83a618..fa798af 100644
--- a/fishbase/fish_date.py
+++ b/fishbase/fish_date.py
@@ -1,5 +1,6 @@
 # coding=utf-8
 
+import time
 from datetime import datetime, timedelta
 import calendar
 import random
@@ -8,7 +9,7 @@
 # 2016.4.26
 # 输入: date_kind, eg 'last month', 'this month'
 # 输出: tuple, type datetime.date eg '2016-03-01' '2016-03-31'
-# v1.0.14 #61, edit by Hu Jun
+# v1.0.14 edit by Hu Jun #61
 def get_date_range(dates, separator='-'):
     """
     获取某个月的日期范围，返回该月第一天和最后一天的字符串表示
@@ -59,7 +60,7 @@ def get_date_range(dates, separator='-'):
     return first_day, last_day
 
 
-# v1.0.14 #37, edit by Hu Jun
+# v1.0.14 edit by Hu Jun #37
 def get_years(months=0, refer=None):
     """
     获取基准时月份增量的年月
@@ -106,7 +107,7 @@ def get_years(months=0, refer=None):
     return ''.join(['%04d' % y, '%02d' % m])
 
 
-# v1.0.16 #87, edit by Hu Jun
+# v1.0.16 edit by Hu Jun #87
 class GetRandomTime(object):
     """
     获取随机时间
@@ -186,7 +187,7 @@ def date_time_this_year():
         return this_year_start + timedelta(seconds=random_seconds)
 
 
-# v1.1.0 #90, edit by Hu Jun
+# v1.1.0 edit by Hu Jun #90
 def get_time_interval(start_time, end_time):
     """
     获取两个unix时间戳之间的时间间隔
@@ -236,7 +237,7 @@ def get_time_interval(start_time, end_time):
     return interval_dict
 
 
-# v1.1.0 #93, edit by Hu Jun
+# v1.1.0 edit by Hu Jun #93
 def transform_unix_to_datetime(timestamp):
     """
     将unix时间戳转换成datetime类型
@@ -270,3 +271,37 @@ def transform_unix_to_datetime(timestamp):
 
     date_type = datetime.fromtimestamp(timestamp)
     return date_type
+
+
+# v1.1.1 edit by Hu Jun #101
+def transform_datetime_to_unix(dtime=None):
+    """
+    将datetime类型转换成unix时间戳
+
+    :param:
+        * dtime: (datetime) datetime类型实例,默认为当前时间
+    :return:
+        * data_type: (datetime) datetime类型实例
+
+    举例如下::
+
+        print('--- transform_datetime_to_unix demo ---')
+        dtime = datetime.datetime.now()
+        ans_time = transform_datetime_to_unix(dtime)
+        print(ans_time)
+        print('---')
+
+    执行结果::
+
+        --- transform_datetime_to_unix demo ---
+        1535108620.0
+        ---
+
+    """
+    if not dtime:
+        dtime = datetime.now()
+
+    if not isinstance(dtime, datetime):
+        raise TypeError('dtime should be datetime, but we got {}'.format(type(dtime)))
+
+    return time.mktime(dtime.timetuple())
diff --git a/setup.py b/setup.py
index d43aedf..8ecec69 100644
--- a/setup.py
+++ b/setup.py
@@ -2,20 +2,25 @@
 from setuptools import setup
 import io
 import re
+
+with io.open('README.rst', 'rt', encoding='utf8') as f:
+    readme = f.read()
+
 with io.open('fishbase/__init__.py', 'rt', encoding='utf8') as f:
     version = re.search(r'__version__ = \'(.*?)\'', f.read()).group(1)
 
 setup(
     name='fishbase',
     version=version,
-    install_requires=['python-dateutil'],
+    install_requires=['python-dateutil',
+                      'pyyaml'],
 
     url='https://github.com/chinapnr/fishbase',
     license='MIT',
     author='David Yi',
     author_email='wingfish@gmail.com',
     description='some useful functions for python',
-
+    long_description=readme,
     packages=['fishbase'],
 
     # packages=['fishbase', 'fishbase.naive_bayes'],
diff --git a/test/test_common.py b/test/test_common.py
index a0da6b3..335b655 100644
--- a/test/test_common.py
+++ b/test/test_common.py
@@ -365,4 +365,12 @@ def test_get_sub_dict_02(self):
             get_sub_dict(dict1, 'test_list')
     
         with pytest.raises(TypeError):
-            get_sub_dict('test_dict', list1)
\ No newline at end of file
+            get_sub_dict('test_dict', list1)
+
+    # test transform_hump_to_underline() tc
+    def test_transform_hump_to_underline(self):
+        hump_param_dict = {'firstName': 'Python', 'Second_Name': 'zhangshan', 'right_name': 'name'}
+        underline_param_dict = transform_hump_to_underline(hump_param_dict)
+
+        assert 'firstName' not in underline_param_dict
+        assert 'first_name' in underline_param_dict
diff --git a/test/test_date.py b/test/test_date.py
index 15d174e..04bf7e7 100644
--- a/test/test_date.py
+++ b/test/test_date.py
@@ -92,6 +92,21 @@ def test_transform_unix_to_datetime_01(self):
     #  测试 transform_unix_to_datetime()  tc
     def test_transform_unix_to_datetime_02(self):
         timestamp = '1534938627'
-    
+
+        with pytest.raises(TypeError):
+            transform_unix_to_datetime(timestamp)
+
+    #  测试 transform_datetime_to_unix()  tc
+    def test_transform_datetime_to_unix_01(self):
+        dtime = datetime.datetime.now()
+        ans_time = transform_datetime_to_unix(dtime=dtime)
+
+        assert isinstance(ans_time, float)
+        assert len(str(ans_time)) == 12
+
+    #  测试 transform_datetime_to_unix()  tc
+    def test_transform_datetime_to_unix_02(self):
+        dtime = '1534938627'
+
         with pytest.raises(TypeError):
-            transform_unix_to_datetime(timestamp)
\ No newline at end of file
+            transform_datetime_to_unix(dtime=dtime)