我安装了Pillow,之后我想做:
from PIL import Image
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我收到以下错误:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 61, in <module>
ImportError: cannot import name _imaging
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但是,如果我单独导入这些,一切都很好,即:
import _imaging
import Image
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你知道问题可能是什么吗?
最近我开始了一个 C++ 的新项目。问题是,当我尝试编译它时,出现链接错误。我今天花了一整天的时间尝试调试它,但我并没有真正在任何地方找到好的解决方案。如果有人能帮忙那就太好了。我使用的是 Mac Sierra。
parsing/methylation.h
#ifndef EPIRL_METHYLATION_H
#define EPIRL_METHYLATION_H
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <sstream>
using namespace std;
namespace methylation {
struct MethLine {
string chr;
int coord;
char strand;
int methylated;
int un_methylated;
string context;
string tag;
};
string calculateMethylationByContext(
MethLine m_input[], int length,
int window_start, int window_end, int threshold);
void calculateMethylation(
const istream &methylation_stream,
const istream &coordinate_stream,
const ostream &output_stream
);
}
#endif //EPIRL_METHYLATION_H
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parsing/methylation.cpp
#include "methylation.h"
namespace methylation {
string calculateMethylationByContext(
MethLine …Run Code Online (Sandbox Code Playgroud) 我是lisp的新手,之前有过函数式编程(Haskell,SML)的经验.为什么这段代码会返回14,而不是10(即1 + 2y + 3 + 1)?
(defvar x 1)
(defun g (z)
(+ x z))
(defun f (y)
(+ (g 1)
(let ((x (+ y 3)))
(g (+ y x)))))
(f 2)
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