pip2でnltkをインストールする方法を教えて下さい

前提・実現したいこと

pip2でのnltkインストール中に以下のエラーが発生し、インストールに失敗しました。

発生している問題・エラーメッセージ

Processing /root/.cache/pip/wheels/c7/b1/76/54236c34227a12d32dc9cfe18731976baf8950d8a5aabaea6c/nltk-3.5-py2-none-any.whl
Requirement already satisfied: click in /usr/local/lib/python2.7/dist-packages (from nltk) (7.1.2)
Requirement already satisfied: tqdm in /usr/local/lib/python2.7/dist-packages (from nltk) (4.54.1)
Requirement already satisfied: joblib in /usr/local/lib/python2.7/dist-packages (from nltk) (0.14.1)
Collecting regex
Using cached regex-2020.11.13.tar.gz (694 kB)
Building wheels for collected packages: regex
Building wheel for regex (setup.py) ... error
ERROR: Command errored out with exit status 1:
   command: /usr/bin/python -u -c 'import sys, setuptools, tokenize;
   sys.argv[0] = '"'"'/tmp/pip-install-S2hLKa/regex/setup.py'"'"';
   __file__='"'"'/tmp/pip-install-S2hLKa/regex/setup.py'"'"';
   f=getattr(tokenize, '"'"'open'"'"', open)(__file__);
   code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');
   f.close();
   exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-2P6E6l
       cwd: /tmp/pip-install-S2hLKa/regex/
  Complete output (20 lines):
  running bdist_wheel                                                     
  running build                                                           
  running build_py                                                        
  creating build                                                          
  creating build/lib.linux-x86_64-2.7                                     
  creating build/lib.linux-x86_64-2.7/regex                               
  copying regex_2/__init__.py -> build/lib.linux-x86_64-2.7/regex         
  copying regex_2/regex.py -> build/lib.linux-x86_64-2.7/regex            
  copying regex_2/_regex_core.py -> build/lib.linux-x86_64-2.7/regex      
  copying regex_2/test_regex.py -> build/lib.linux-x86_64-2.7/regex       
  running build_ext                                                       
  building 'regex._regex' extension                                       
  creating build/temp.linux-x86_64-2.7                                    
  creating build/temp.linux-x86_64-2.7/regex_2                            
  x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-uC7NI8/python2.7-2.7.18=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c regex_2/_regex.c -o build/temp.linux-x86_64-2.7/regex_2/_regex.o                                                                
  regex_2/_regex.c:50:10: fatal error: Python.h: そのようなファイルやディ レクトリはありません                                                      
     50 | #include "Python.h"                                             
        |          ^~~~~~~~~~                                             
  compilation terminated.                                                 
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1         
  ----------------------------------------                                
ERROR: Failed building wheel for regex
  
  
  
Running setup.py clean for regex
Failed to build regex
Installing collected packages: regex, nltk
Running setup.py install for regex ... error
ERROR: Command errored out with exit status 1:
     command: /usr/bin/python -u -c 'import sys, setuptools, tokenize; 
	 sys.argv[0] = '"'"'/tmp/pip-install-S2hLKa/regex/setup.py'"'"';
	 __file__='"'"'/tmp/pip-install-S2hLKa/regex/setup.py'"'"';
	 f=getattr(tokenize, '"'"'open'"'"', open)(__file__);
	 code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');
	 f.close();
	 exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-Z_CIMI/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/include/python2.7/regex       
         cwd: /tmp/pip-install-S2hLKa/regex/                              
    Complete output (20 lines):                                           
    running install                                                       
    running build                                                         
    running build_py                                                      
    creating build                                                        
    creating build/lib.linux-x86_64-2.7                                   
    creating build/lib.linux-x86_64-2.7/regex                             
    copying regex_2/__init__.py -> build/lib.linux-x86_64-2.7/regex       
    copying regex_2/regex.py -> build/lib.linux-x86_64-2.7/regex          
    copying regex_2/_regex_core.py -> build/lib.linux-x86_64-2.7/regex    
    copying regex_2/test_regex.py -> build/lib.linux-x86_64-2.7/regex     
    running build_ext                                                     
    building 'regex._regex' extension                                     
    creating build/temp.linux-x86_64-2.7                                  
    creating build/temp.linux-x86_64-2.7/regex_2                          
    x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-map=/build/python2.7-uC7NI8/python2.7-2.7.18=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c regex_2/_regex.c -o build/temp.linux-x86_64-2.7/regex_2/_regex.o                                                              
    regex_2/_regex.c:50:10: fatal error: Python.h: そのようなファイルやデ ィレクトリはありません                                                    
       50 | #include "Python.h"                                           
          |          ^~~~~~~~~~                                           
    compilation terminated.                                               
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1       
    ----------------------------------------                              
ERROR: Command errored out with exit status 1: /usr/bin/python -u -c 'import sys, setuptools, tokenize;
	sys.argv[0] = '"'"'/tmp/pip-install-S2hLKa/regex/setup.py'"'"';
	__file__='"'"'/tmp/pip-install-S2hLKa/regex/setup.py'"'"';
	f=getattr(tokenize, '"'"'open'"'"', open)(__file__);
	code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');
	f.close();
	exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-Z_CIMI/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/include/python2.7/regex Check the logs for full command output.